Strain Measurement Devices Ltd
About this exhibitor
Strain Measurement Devices is a world leader in specialty sensor design and manufacture. Established in 1979, SMD is devoted to exclusively creating and manufacturing custom and standard sensors, supplying leading-edge technology offering superior stability, temperature, performance, design flexibility and low power consumption.
Our Product Portfolio in Standard form or Custom/ OEM include:
Float, Optical, Ultrasonic and Non-invasive Liquid Level sensors
Thin Film Load Cells/ Force Sensors
Thin Film Pressure Sensors
Bubble / Air-in-Line sensors
Non-invasive Liquid Flow Meters
Custom Solutions
Products & Services
Liquid Level Sensors / Multi level custom switches FM10/ FM11/ FM12
Ideal for small and medium tank level detection in restrictive spaces, our FM10, FM11 and FM12 liquid level sensors can be mounted externally through 1” or larger NPT holes to sense multiple levels. Flange mount, bulkhead, or other custom fittings are also available depending on your specific hardware needs.We have a wide range of material and shape / sizes available.
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Chemical Compatible Custom Float switches / Liquid level sensors
Standard or Custom designs - Injection molded or Machined plastics for High volume / OEM use or for Chemical Fluid applications. Regulate liquid levels, detect fluid leaks, and more with fully customizable designs to work across a near-endless variety of applications, our polypropylene / PVDF / NYLON / Others - level switches are for unmatched reliability and longevity.
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Optical Liquid Level Sensors- Various Materials available for chemical compatibility
SMD Fluid Controls’ optical liquid level sensors have are ideal for point level sensing in water and other liquids including chemicals. These optical level sensors provide a switched output that can sense the presence or absence of fluid. Our diverse range of optical sensors are capable of point level sensing and pressure level sensing up to 250 PSIG.These compact, inexpensive optical level sensors use cutting-edge technology. As a result, these sensors achieve the ultimate reliability and cost-effectiveness solutions for applications where absolute precision is paramount.
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FL50 – ULTRASONIC POINT LEVEL SENSOR
This plastic ultrasonic point level sensor is made of durable nylon or polypropylene for unmatched chemical resistance. As a result, the FL50 level sensor can be used across a wide range of industrial applications, including hydraulic fluids, oils, and slurries. Ultrasonic liquid level sensors work by emitting high-frequency sound waves and detecting changes in the waves as they bounce back to the sensor. This technology makes this ultrasonic sensor capable of both point level and continuous sensing applications. The FL50 features a relay output with 1 A max switching current, 5-15 max voltage, temperature maximum of 90°C, and a max pressure of 150 PSIG.Ultrasonic level sensors are the most reliable option available to measure things like bulk solids or highly viscous liquids. If your application requires remote monitoring this would likely be the best option for your needs because it can continually monitor the presence or absence of media in the environment.
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Bubble Sensors and Air In-Line Sensors
Our highly reliable bubble sensors and air in line detectors include the latest in digital sensing technology that can be calibrated to precisely detect bubbles in almost any fluid and tubing material across a wide range of tubing sizes.Noninvasive Bubble Sensors Our noninvasive bubble sensors can be designed for any tubing material: steel, plastic (PVC, fluoropolymers including Teflon, polyethylene, nylon, etc.), silicone, glass, and others. These non-contact, standard bubble sensor models are available for tubes as small as 1/16" OD and as large as 1/2" OD. We also offer custom bubble detectors for larger tubes.
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Ultrasonic Flow Meters - Non-Invasive Measurement
SMD ultrasonic flow meters are designed to provide high accuracy and reliable flow measurement of liquids. The transit-time based technology measures the velocity of the liquid which can then be used to calculate the liquid’s volumetric flow. These products are well suited for medical, laboratory, and industrial / chemical applications.
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Capacitive Level Sensors - Non contact liquid level measurement
Capacitive level sensors take advantage of the difference in dielectric constant between air and most liquids to non-invasively measure the presence or absence of liquids in a container non-invasively. They’re ideal for detecting liquids inside of thin-wall non-conductive vessels.Every application is different, and suitability depends on a range of factors, but the table below is intended as a starting point to decide whether capacitive sensing is right for an application.
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Custom Occlusion Sensors
In the medical device industry, occlusions are full or partial blockages that restrict flow in a tube. In a typical system where the flow is achieved with a positive displacement pump such as a peristaltic pump, there are two main types of occlusions:Downstream occlusions are tube blockages that occur downstream of the pump. These occlusions result in a lack of liquid flow and, when using a positive displacement pump, they can cause dangerous pressure buildups that can result in burst tubing or, if the tube is only momentarily occluded, it can send high-pressure liquid into a patient. Upstream occlusions are tube blockages that occur upstream of the pump. These occlusions are characterized by a decrease in pressure (vacuum) in the upstream tubing and restrict flow through the pump. Note that an IV bag running dry has the same effect as an upstream occlusion and can also be detected by an occlusion sensor.Possible reasons for customizing an occlusion sensor are: Distinctive geometry, unique size, or maximum capacity Integration of the sensor in complex subassemblies or combining the occlusion sensor with different types of sensors (e.g. combined bubble and occlusion sensors) Shielding the sensor from severe conditions Integrating custom calibrated electronics and lead-outs Wireless communications
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Thin Film Micro Load Cell and Force Sensors
Strain Measurement Devices' load cell sensor portfolio continues to build on an early foundation of providing sensors for the medical device market. Now serving the aerospace, biopharmaceutical and semiconductor markets as well, SMD has become the world leader for OEM - quality, thin film strain gauge load cell sensors.Small Load Cell Sensors In A Variety of Sizes & Capacities Standard SMD load cell sensor designs are available in a wide range of capacities, from milligrams to 5,000 Kg — with many models offering built-in overload protection via deflection stops. Custom, low profile load cell sensors can be miniature to fit small space application parametersLoad Cell Sensors Custom Engineered To Fit Your Application Armed with 30 years of technical experience and our leading-edge thin-film sensors manufacturing process, SMD engineers can produce application-specific miniature load cell sensor and micro load cell designs within tight time frames. These small load cell sensors can withstand the high temperature, pressure, and humidity of repeated autoclave cycles. SMD also offers custom electronic integration support for our OEM customers.Autoclavable Force and Pressure Sensors SMD now offers autoclavable strain gauge technology on all standard and custom sensors. These harsh environment sensors are completely hermetic, survive 100% humidity, PH of 11, and temperatures up to 200 °C. Ask about our current availability.
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Pressure Sensors - Engineered To Perfection- Proprietary Thin Film Strain Gauge
Pressure Sensors Engineered To Perfection Strain Measurement Devices' miniature technology provides medical devices with precise noninvasive measurement of pressure and flow while offering control and validation of fluid deliveries in disposable sets. The extreme accuracy and repeatability in our OEM solutions provide key advantages for a variety of mission-critical applications. Pressure sensors are also ideal for harsh, high-pressure environments.Proprietary Thin Film Strain Gauge Our thin-film strain gauge process gives our sensors unsurpassed long term stability, even in the harshest environments. With our proprietary process of sputtering the circuit directly onto the pressure, the sensor surface is optimal for high-temperature environments. SMD can craft standard and custom designs with short lead times using nearly any material including aluminum, stainless steel, Hastelloy™, and sapphire.Standalone or Assembly Fittings: Customers have the option of welding these pressure sensors to a fitting or component of their choice. SMD Sensors provides welding services.
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