Why Use Servoflo for Board Level Pressure Sensors

Posted by Seta Davidian on Jun 16, 2020 10:02:31 AM

Users of pressure sensors enjoy a broad selection of models and manufacturers from which to choose. While detailed specifications of individual models are easy to come by, it often helps to understand more about the overall supplier. The following blog post compares board-level pressure sensors from Servoflo and other providers of pressure sensors.

Advantages of Servoflo

At Servoflo, we distribute a broad range of pressure sensors from leading manufacturers, including Fujikura, TE Connectivity, Merit Sensors, Silicon Microstructures and many more. Our sensor products meet the board-level pressure measurement requirements across different price and performance points for pressure ranges from 2-inch water column (WC) to several thousand psi for applications in the medical, HVAC, and industrial industries.

By partnering with us, our customers benefit from our:

Individualized Customer Service

We focus on providing individual attention to meet the unique needs of our customers rather than locking them into a single family of standard products that feature unnecessary features at additional costs. Additionally, some of our suppliers provide customers with the opportunity to produce modified sensor designs that fit their specific applications in very low volumes with little to no price premium or expensive upfront investment. This level of customer service and customizing is not available from many large providers (both distributors & large manufacturers).

Greater Flexibility and Added Benefits

In many cases, pressure is not the only parameter requiring measurement. Other critical parameters that may require monitoring include mass flow, humidity, and temperature. We consider all of these factors and more when curating our product selection to offer solutions that meet a broader range of applications at competitive prices. In addition, we can provide benefits like inventory management, stocking, responsiveness, and easy access to technical support like we do.

Sample Overview of Fujikura Sensors

al4-headerFujikura’s AL4 pressure sensor is a low-pressure sensor with digital output. It consists of a silicon piezoresistive pressure sensing chip combined with a signal conditioning integrated circuit. This sensor amplifies the low-level signal from the sensing chip, applies temperature compensation and calibration, and converts it to digital data in proportion to the applied pressure. Highlighted features of this sensor include: 

  • Gauge: positive, negative, or bi-directional
  • Differential: new feature now available!
  • Pressure Ranges: 0–1 kPa (.145 psi) to 0–10 kPa (1.45 psi), depending on model
  • Pressure Media: non-corrosive gases
  • Supply Voltage (constant voltage): 5 +/-0.25 VDC, 3.3 VDC, or 3.0 VDC
  • Accuracy: +/-1.5% FS
  • Ports: dual barbed
  • Size: 11.36 mm x 10.32 mm x 10.32 mm SMT package

Typical uses include battery-operated devices, medical equipment, industrial pneumatic devices, and various consumer devices.

Overview of Silicon Microstructures Sensors

sm933x-headerMEMS pressure transducer technology and CMOS mixed-signal processing come together in the SM9333/SM9336 ultra-low differential pressure sensor. These sensors offer digital, fully conditioned, and multi-order pressure and temperature-compensated sensing. The highlighted features of this model include: 

  • Pressure Range: 125 Pa to 250 Pa differential
  • Digital Interface: 16 bit I2C
  • Compensated Temperature Range: -20° C to 85° C
  • Total Accuracy: +1% full-scale
  • Insensitivity to mounting orientation
  • Robust JEDEC SOIC (16 package with a dual vertical porting option)

Quality Sensors From Servoflo

The above highlighted products are 2 examples of our extensive product offering. We have many more product options that fit a wide variety of needs. High-quality products, individualized customer service, product design flexibility, and a variety of added benefits make Servoflo the better choice for board-level pressure sensors. Contact us to learn more about our board-level pressure sensor solutions or request a quote for our products from one of our experts.

 

Topics: Pressure Sensors

Pressure Sensors for the Medical Industry

Posted by Seta Davidian on Dec 4, 2019 1:05:40 PM

In the medical industry, board level pressure sensors are commonly used in patient monitoring equipment. When used in treatment equipment, such as drug delivery systems or respiratory devices, they can act as monitors that trigger upon reaching a preset threshold and tell the control units to continue, change, or cease treatment.

image003 (1)

Servoflo has worked with Fortune 500 major medical equipment manufacturers by providing pressure sensors and other environmental sensors in applications such as:

 
  • Respirators and breath detection equipment
  • O2 concentrators and conservers
  • Deep vein thrombosis treatment
  • Infusion pumps
  • Inflatable mattresses
  • Blood pressure measurement

Pressure Sensors for Respirators and Breath Detection Equipment

Our pressure sensors for respirator and breath detection equipment generally monitor low-pressure conditions. They come in a variety of gauge or differential models, digital or analog outputs, and supply voltages. A good example of a pressure sensor is the AL4 Series.  The AL4 has various pressure ranges as low as 0-1 kPa (0.145 psi) with a digital output. What makes the AL4 special is that it has a high overpressure of 15 psi.

 Check out the industry page to review our wide selection of respirator and breath detection equipment pressure sensors.

Pressure Sensors and Oxygen Sensors for O2 Concentrators and Conservers

Oxygen concentrators take in air, filter out impurities and other gases, and deliver pure oxygen to patients who require oxygen therapy, such as ones undergoing surgery or treatment for lung disease. Due to their critical function, these machines require highly accurate and consistent pressure sensors that can ensure precise and accurate control over treatment.oxygen-concentrator-header (1)

There are two applications for pressure sensors. The first is breath detection, similar to the respirator application described above. The second is to monitor the pressure in the oxygen line, which typically runs between 30-40 psi.

In this pressure range, there are many choices for sensors. Because there are so many options to choose from, Servoflo can help narrow down the choices for you by helping you choose a sensor based on your exact requirements. This way, you will not pick a sensor that is neither not accurate enough nor too accurate (& higher cost) for your application.

We also offer oxygen sensors that monitor the oxygen percentages delivered to the patient. Check out the product page to more about our selection of pressure sensors and oxygen sensors for O2 concentrators and conservers.

Pressure Sensors for Deep Vein Thrombosis Treatment

Deep vein thrombosis, also referred to as DVT, occurs when a blood clot develops in a vein located deep within the body. Pneumatic compression devices can prevent DVT or facilitate treatment by promoting circulation and lymphatic drainage. Typical pressures run about 5 psi.

Our pressure sensors for deep vein thrombosis treatment equipment feature a variety of specifications, including in regard to outputs, pressure ranges, and accuracy levels, to ensure that individualized DVT treatments occur as expected. Check out the product page to more about our selection of deep vein thrombosis pressure sensors.

Infusion Pumps

Medical professionals use infusion pumps in hospitals, medical offices, nursing homes, and private residences to deliver vital fluids, such as nutrients, medication, or saline, to a patient’s body. These machines need accurate pressure sensors to maintain a controlled flow. The pressure sensors are used to monitor the pump’s backpressure to ensure that the pump is working correctly.

infusion-pump-2 (1)Our infusion pump pressure sensors meet a variety of pressure range demands. The sensors are temperature-compensated and have chips that provide data for smart infusion pump equipment. Check out the product page to more about our selection of infusion pump pressure sensors.

Inflatable Mattresses

Medical inflatable mattresses have more specialized functions than traditional inflatable mattresses. They enhance circulation to prevent soreness, stress, or decreased blood flow while providing support and comfort. Patients use medical inflatable mattresses during extended periods of bed rest to reduce the risk of skin shearing and pressure sores. Different varieties of these mattresses need pressure sensors, typically 3 psi and below, to prevent air loss or replenish lost air.

Our line of sensors facilitates the maintenance of stable, comfortable pressure levels and monitor the mattress’s fluid conditions to protect the patient. Check out the product page to more about our selection of inflatable mattress pressure sensors.

Blood Pressure Measurement

Blood pressure measurement is one of the main applications of medical pressure sensors. The sensors allow for non-invasive measurement of blood pressure, providing insight into a patient’s condition during routine appointments, extended hospital stays, and medical treatments. The pressure sensors are used in electronic blood pressure equipment (not the traditional mechanical units used in a doctor’s office).

Our pressure sensors come in a variety of power requirement, display, pressure threshold, and size options. We have pressure sensors designed specifically for blood pressure instrumentation. The models include the AP3/AG3NIBP. This is a standard sensor specially calibrated  for +/- 3 mm of mercury. Check out the product page to more about our selection of blood pressure sensors.

Contact Servoflo for Your Medical Pressure Sensor Needs Today

Pressure sensors serve an important role in many medical applications. As such, it’s crucial to choose high-quality sensors that exactly suit the nature and requirements of the application. To learn more about our pressure sensors, contact us today. For assistance choosing one for your application, download our eBook or request a quote.

 

Topics: Pressure Sensors

Visit Us at Sensors Expo June 26-28

Posted by Seta Davidian on Apr 18, 2018 12:49:44 PM

Servoflo will be exhibiting at this year's Sensors Expo from June 26-28, 2018 in San Jose. We are pleased to offer free exhibit passes and $100 off the conference attendance to our customers and visitors (use code 232L when registering). Please see the information below on how to register. We will be there with all of our products!

Visit us at Booth 648!

s18_GuestPass_ServofloCorp

Sensors Expo & Conference
Conference & Expo: June 26-28, 2018
Pre-Conference Symposia: June 25, 2018
McEnery Convention Center
San Jose, CA
www.sensorsexpo.com

Event Description
Sensors Expo & Conference is the only industry event in North America exclusively focused on sensors and sensor-integrated systems. For more than 30 years, Sensors Expo has brought technical innovation and thought leadership to engineers involved in the development and deployment of sensors and sensing systems. During this information packed, 3-day program, explore cutting-edge trends and applications through new products, technology pavilions, demos, and showcases of 300+ of the latest sensors. The featured technology displayed includes: Energy Harvesting & Power, Emerging Technologies, Flexible & Wearable Tech, IoT & Wireless, Measurement & Detection, MEMS & Sensors, Novel Sensor Applications, Optical Sensing & Detection, Sensors & Embedded Systems, and Sensor Data. New this year, the event will be co-located with the Medical Sensors Design Conference and an Autonomous Vehicle Sensors Conference. This educational, information-packed Sensors & Connectivity week provides the ideal place for technologists to find opportunities and engineers to innovate solutions.

Topics: Sensors Expo, Pressure Sensors

Choosing Between Calibrated and Uncalibrated Pressure Sensors

Posted by Seta Davidian on Aug 3, 2017 4:54:41 PM

When selecting a pressure sensor for a specific application, designers must first determine the total system accuracy required, as well as the performance requirements for the lifetime of the product.

Like a bathroom scale that is used day after day, a pressure sensor's output may vary over time. The amount of drift depends on the specification given by the manufacturer. Other factors, such as humidity and operating temperature range, can also affect the accuracy of a pressure sensor, regardless of which type of sensor you purchase.

In critical applications requiring optimal accuracy and minimal drift, designers will have to either calibrate or tweak the performance of the pressure sensor to meet the system accuracy requirements. Furthermore, some systems often require recalibration or resetting to zero to ensure optimal reliability after extended use. Back to our example, a good analogy is a mechanical scale, in which the zero point will drift over time and the user must adjust the zero point to maintain accurate weight measurements.

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Precision Vs. Resolution

The overall reliability and accuracy of sensors depend on two main factors: precision and resolution. Optimal precision allows sensors to produce the same output for the same input, while optimal resolution allows sensors to reliably detect small changes within a measured parameter.

Noise can greatly affect precision, as measurement systems with a low signal-to-noise ratio will inevitably struggle to make repeatable measurements. Hysteresis, meanwhile, will cause sensors to read low with increasing signals and high with decreasing signals.

Like precision, optimal linearity is also critical for successful sensor operation, allowing output to be directly proportional to input. Similarly, speed plays a role as well, since sensors that produce precise readings at faster rates allow for smoother, quicker processes.

Ways to Calibrate Your Sensor

Sensor calibration can be done following a two-step process or a one-step process, in which one of the following actions is carried out:

  1. Calibration of the front-end analog circuit errors – This accounts for input offset, gain, and nonlinearity issues that are introduced in the signal from the sensing element before digitization. This step can be done by either the sensor manufacturer or by the customer. To decide who does this step depends on target performance and cost. This is the classic make or buy decision.
  2. Calibration of the back-end analog circuit errors — This accounts for errors in the signal that occur after being conditioned by the digital circuits and converted back to analog form. For example, a customer purchases a fully calibrated sensor with a 1.5% accuracy, then further refines the output with additional components to achieve 1% accuracy. Often this step is done by customers.

Sensor Choices

Three options are available when deciding what kind of pressure sensor to purchase.

  1. FPM-header.jpgCalibrated, compensated, and amplified – These sensors come with a fully signal-conditioned output (voltage or digital) and are compensated for a wide temperature range and calibrated over a broad pressure range. These sensors provide the fastest time to market for the end design. Some can be used with a high-resolution A/D to allow further tweaking in the final product. A good product example is the AP4/AG4 pressure sensor with digital output.
  2. Calibrated, compensated, and unamplified – These sensors have an output signal that is not amplified (millivolt) but feature built-in temperature compensation. Users can employ the unamplified signal to customize an output around system requirements, allowing the user to ignore portions of the calibration range that are not used in the end design or allow for wider tolerance. Here, an example of this model is the MS4425 or SM5652.
  3. Uncalibrated, uncompensated, and unamplified – This option is ideal for users focusing on trend over precision. Users can establish their own calibration process and can create their own auto-zero and single-point control functions (such as on/off). Product examples in this category are the FPN/FGN Series.

When selecting a sensor, some key considerations should be kept in mind, including:

  • What capabilities are available in regard to electronics design?
  • Are environmental chambers or other specialty equipment needed?
  • How is my bill of materials and product cost-affected by my choice?
  • Can the sensor manufacturer offer a modified solution to help me reach my goal?

Learn More

To learn more about pressure sensors and the various options available for your application, download Servoflo's comprehensive Pressure Sensor Selection Guide.

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Topics: Pressure Sensors, calibrated, uncalibrated

Reduce Your Overall Bill of Materials with a Sensor Solution Tailored for Your Application

Posted by Seta Davidian on Jun 1, 2017 3:03:17 PM

A bill of materials, though intended to estimate project costs for production volumes, can actually distract from one of the most expensive aspects of a project — the labor required to inspect, install, and test different components. By focusing on the price tag of individual components themselves, manufacturers often overlook the additional costs of board space, sourcing from multiple distributors, calibration labor, stocking locations, and multiple purchase orders.

Alternatively, sourcing one complete sensor solution from one provider can alleviate all of these pain points while incurring lower service costs down the road. In particular, customers without explicit sensor design/calibration expertise can greatly benefit from an all-in-one solution, as it allows them to reduce both labor and overall bill of materials costs.

gauge.jpgPartnering with the factories we represent,  Servoflo supports customers anywhere along the price/performance continuum from the most basic components to modified output sensors to completely customizable turnkey sensor solutions across a wide range of industries. Depending on the factory/partner, it could be possible to add a display unit, Wi-Fi, or Bluetooth capabilities.  Or,  adding a flex to a sensor, creating packaging enclosures and custom flow paths, or integrating multiple parameters into a single sensor.  It is worth the time and effort to ask:  Who can best provide the required features:  factory or customer?

Throughout our nearly 30 years of experience providing efficient, reliable sensor related services, we’ve handled a diverse range of projects. Below are some examples of our past work and tailored solutions.

  • flex.jpgCreating a pressure gauge with display and enclosure
  • Integrating a pressure sensor and electronics in a hybrid circuit design for better protection in high-temperature and high-humidity environments
  • Eliminating installation assembly and testing by adding a flex cable to a standard board level sensor
  • Customizing sensor calibration and output to meet exact customer specifications
  • Designing a custom flow path in a mass flow sensor for medical equipment
  • Designing custom electronics to create pressure switches, mass flow switches, and other environmental sensors

As with all of our application specific work, these solutions helped customers simplify their bill of materials and reduce downstream maintenance costs for maximum lifetime cost efficiency.

Optimize Your Sensor Solution with Servoflo

Servoflo is proud to be a one-stop shop for reliable, industry-leading solutions tailored to your unique system requirements. By dealing with one vendor, one point of contact, and one invoice, you can greatly simplify your bill of materials and reduce overall costs.

To discuss a custom sensor solution based on your specific needs, contact Servoflo today.

 

Topics: Pressure Sensors, Sensor Solution

Visit Us at Sensors Expo June 27-29!

Posted by Seta Davidian on May 18, 2017 1:12:49 PM

S17_sponsors_logo_Exhibitor.jpg

Come visit Servoflo at Booth 648 during Sensors Expo June 27-29 in San Jose, California! Here is a great from Sensors Expo:

"The Sensors Conference is where you'll find the best in the sensors industry, along with new and innovative ways to jump start your sensor solutions. It's North America's largest and most comprehensive educational program that brings together thousands of engineering professionals all under one roof.

With updated and expanded tracksexciting and visionary Keynote Presentations, and new Pre-Conference Symposia, the Sensors 2017 Conference Program brings you the leading sensors content that you need to succeed from over 100 industry experts. Expanding the program to include interactive content, applications, demos, and hands-on components, the 2017 Conference will have you walking away with the sensors solutions you need."

Visitors to our booth who share their pressure sensor or mass flow sensor application is elible to enter our drawing for a $100 Amazon gift card!

 

Topics: Sensors Expo, Pressure Sensors

Pressure Sensor Clearance Sale!!

Posted by Seta Davidian on Jan 19, 2017 12:07:16 PM

sale.jpg

We have some specific pressure sensors on sale! Take a look at our clearance inventory for heavily discounted opportunities. These parts have never been used by customers. Check back frequently for updates.

Model Description Qty  Price  Comments
XFGM-6100KPGSR Fujikura pressure sensor, 0-100 kPa, 2.5% accuracy, surface mount 6 mm port 865 $1.00 or best offer Various lots since 2007, must purchase in reels of 500 pcs.
33A-002F-3210-R Sensormate SLP Series, SMT, 0-2 psi, 0.5 to 4.5V output, tape & reel 10,754 $3.75 or best offer From 2014 & 2015. Must purchase reels of 250 pcs.
AG203-050KG-TP Fujikura pressure sensor, 0-50 kPa, 1.5% accuracy, surface mount, 3 mm port, 5V supply, tape & reel 6,000 $3.00 or best offer Brand new! From 2016 & 2017. Must purchase in reels of 500 pieces


ag2.jpgPayment terms are prepayment via check or credit card only. No performance guarantees or warranties are in effect. The pdf data sheet is in the model number link. The quantity available is subject to change without notice.

Contact us or call us at 781-862-9572 to make an offer.

Topics: Pressure Sensors

Ceramic Pressure Sensors - Application Examples

Posted by Seta Davidian on Dec 12, 2016 11:05:29 AM

ceramic-group-pressure-head.jpg

Ceramic pressure sensors from Metallux have unique features making them ideal in many applications. These features include:

  • Long-life
  • Robust and reliable
  • High temperature tolerance
  • Ability to have direct contact with liquids and harsh media
  • Washable

Servoflo has in depth experience in helping customers integrate ceramic sensors into their designs. Here are some examples:

  • Utilizing a ceramic sensor to develop an oil level sensor in an automotive application
  • Hydraulic & emissions controls for other types of transportation equipment
  • Industrial transducer development for use in the gas & oil industries as well as heavy manufacturing
  • Semiconductor applications to measure process flows
  • Level sensing applications such as reservoir water level management, wastewater controls and chemical processing
  • Food & beverage applications to monitor ingredient flow
  • HVAC pressure transducers to measure refridgerant levels

One of the most important aspects of our customers' success is the wide range of ceramic sensors offered. Our ceramic pressure sensor line includes many models with unamplified mV signals or signal-conditioned with analog or digital outputs. Customers can use sensors with the mV output if they are able to do signal conditioning and calibration. This allows the customer to modify pressure ranges, output, and accuracy to meet their specific application. The fully calibrated versions with voltage, 4-20 mA or I2C come in two levels of accuracy. Customers can do offset calibration after packaging the ceramic sensor. A customer can utilize these many options in one particular sensor model to create a family of products that can be offered to their own customers. 

housing.pngUnlike typical board mount pressure sensors, ceramic pressure sensors do need to be packaged. Our team of experts can assist you in designing the ideal package for your application. Furthermore, Servoflo offers a special evaluation mounting kit called MEKIT 0400 to help users test ceramic pressure sensors.  This kit costs $145 and is useful for the following 18 mm diameter Metallux sensors: ME501/ME505/ME662/ME651/ME75X/ME77X/ME780.

Learn more about Metallux ceramic pressure sensors

Download the information on the MEKIT 0400

Download Ceramic Pressure Sensor Product & Pricing Guide

Topics: Ceramic Pressure Sensors, Pressure Sensors

Water Level Pressure Sensor FPWS

Posted by Seta Davidian on Nov 14, 2016 1:22:05 PM

water level pressure sensorServoflo is pleased to announce the FPWS Water Level Sensor. The FPWS is a gauge pressure sensor for -49 kPa to 68.5 kpa with a linear voltage output. The sensor is oil-filled for specific use in tank level measurement applications. Typical water exposure is tap water with or without bath or cleaning agents.

Below is a sample bath system using the FPWS.

water-level-sensor.jpg

The following cross sectional diagram illustrates the sensor in detail. Items marked in red are exposed to the water.

FPWS-cross-section.jpg

No. Part Material
1 Housing PPS
2 Cover PBT
3 PC Board FR4
4 Pin Copper Alloy Sn plating
5 Pressure sensor  
6 O ring  
7 Plate SUS
8 Fluorine oil  

 

Applications where the FWCS can be used include:

  • Consumer bath systems
  • Gas & oil heaters
  • Heat pumps
  • Solar heaters
  • Fuel cells

Download the data sheet

or

 Contact Us About the FPWS

 

Topics: Pressure Sensors

Sensor Design Engineering Services

Posted by Seta Davidian on Sep 26, 2016 11:48:16 AM

gauge.jpgServoflo, a premier supplier of pressure, mass flow, environmental sensors and micropumps,  is pleased to announce expansion of its design engineering services for custom sensor development. The objective is to be a primary resource for customers who require modification or customization of sensors and how they are integrated into product designs. Services include but are not limited to:

  • adding flex to a sensor
  • creating a custom flow path for mass flow sensors
  • adding Wi-Fi or BlueTooth™ capabilities to a sensor
  • adding a display
  • custom packaging enclosures
  • hybrid circuit design

flex.jpgThis one-stop solution provides customers with efficient and reliable design expertise without having to manage multiple vendors as well as streamlining assembly. Purchasing a complete solution saves customers money and time. Often, a bill of materials is reviewed and pressure is put on individual component costs. This strategy neglects the labor needed to inspect, integrate, and test various separate components such as a sensor element, cable, and package. A complete sensor solution can actually reduce overall bill of materials and labor costs. This sensor design strategy is also important for customers who may not have design expertise in these areas.

Specific application examples include:

  • Creation of a pressure gauge with display and enclosure
  • Hybrid circuit design to integrate a pressure sensor and electronics for better protection in a high temperature and high humidity environment
  • Adding a flex cable to a standard board level sensor to eliminate the assembly and testing steps at installation
  • Customized sensor calibration and output to meet a specific customer requirement
  • Design of a special flow path in a mass flow sensor for medical equipment
  • Design custom electronics to create a pressure or mass flow switch (or other environmental sensor)

If you have a special requirement you would like to discuss, please utilize the button below for fastest response.

 Discuss a custom solution

Topics: Ceramic Pressure Sensors, Pressure Sensors, Mass Flow Sensors