About us

A mere 3 miles upstream of Niagara Falls, lies the little-known town of Grand Island, New York. Approximately 8 miles long and 6 miles across at its widest point, it is the largest of four islands surrounded by the Niagara River. Situated roughly half way between Buffalo and Niagara Falls, NY, it is referred to as “The Island” by locals, and was here, in 1986, where Mr. Donald J. Less, founded  GP:50 NY LTD.

Our experienced Applications Engineers are ready to assist you in selecting from a wide variety of dynamic force and pressure sensors, piezoelectric (AC coupled) and MEMS (DC coupled) accelerometers, USB triaxial accelerometers with embedded software, and digital bus-based sensors to provide the right sensors for the following markets:

1.  GP:50 Markets

2.  GP:50 Product

3.  Shop GP:50

4.  GP:50 Downloads 

GP:50 Markets


Whether its deep space, sub-sea, or on the ground, GP:50 offers Aerospace, field proven pressure and temperature products to meet the demanding needs of your applications.

With over 30 years of engineering knowledge and field experience, GP:50 provides not only standard products but we can also custom design products to meet the strict demands of your deep space, sub-sea, military ground vehicles, military flight, and mission critical applications with high reliability and high accuracy. Available in both analog and digital outputs, GP:50’s Aerospace products are able to handle pressures from 0-5″ WC thru 100,000 PSI and operating temperatures to 400 °F.

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Transmission, engine, emission, brakes, exhaust and on-board vehicle applications require highly accurate and reliable pressure measurement. But you already knew that. What you want is the most reliable, accurate and highly thermally compensated products available to meet those most demanding automotive testing requirements. At GP:50, we design the products to meet those needs, with pressure ranges from 0-2.5″ WC thru 0-100,000 PSI, along with gage, vacuum, absolute and differential formats, as well as accuracy to 0.05% FSO and thermally compensated from -40 to 250 ºF. GP:50 not only covers a variety of automotive test stand application requirements, but with our analog and digital outputs as well as our custom and miniature designs, we provide some of the broadest offers on the market. 

Industrial Automation

If you’re looking for highly reliable and accurate products for hydraulic and pneumatic controls in gage, vacuum or differential formats in both lower cost OEM as well as custom designs to meet your specific application needs, you’ll find them at GP:50. GP:50 offers a broad range of products to meet the most demanding needs for the control and measurement of many process variables, in both OEM and custom designs. With ranges from 0-20” WC thru 0-100,000 PSI, industry standard process and electrical connections, accuracies to 0.05% FSO as well as analog and digital outputs, GP:50 is your source for reliable and accurate instrumentation.

Oil and Gas

At GP:50, we understand that upstream applications such as fracking, cementing, coil tubing, drilling, and Measurement While Drilling (MWD) require technically demanding products that can handle the shock, vibration and corrosive media found in these environments. That’s why our pressure, level and temperature instruments are designed to provide the means for monitoring and controlling, as well as improving, your oil and gas wellhead applications. Available in both analog and digital outputs, GP:50 products include:

Weco® “Hammer” Union style

Flush mount pressure transmitters

Threaded and flange mounts

Sub-sea rated products to depths of 30,000 FT 

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In the world of product testing and verification where requirements such as high accuracy, cryogenic or high temperatures, low and high pressure ranges, as well as high frequency, high amplitude testing exist – highly accurate and reliable pressure measurement are a must. Such are the requirements typically asked of GP:50. So we custom design products with pressure ranges from 0-20” WC thru 0-100,000 PSI, gage, vacuum, absolute and differential formats as well as ac curacies to 0.05% FSO and operating ranges from -320 to 375 deg F. In short, GP:50 has a product to meet most every test stand requirement.

Water Treatment

When you need to monitor and control lift stations, pond level, weir and tank level control or water line pressure, and especially if you’re up to your neck in raw sewage, you’ll want to “Think GP:50” for accurate and reliable water and wastewater environment products.

With over 30 years of experience, GP:50 offers some of the most reliable, rugged, highly corrosion resistant designs in pressure and level products for both analog and digital outputs. With ranges 

GP:50 Product


Cryogenic quartz dynamic pressure sensors are a high-resolution pressure sensor design, specially made for cryogenic environments. They consistently follow dynamic events found in cryogenic turbo pumps for liquid fuel handling systems or biomedical avoid false data caused by thermal shock.

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Differential pressure sensors are at the heart of various instruments that measure flow, pressure and liquid level of industrial processes. These are larger and more robust than the semiconductor variety but the concept is the same: measuring the difference in pressure across a diaphragm using a strain gauge thin-film resistor network or differential capacitance sensor


Digital Transducers. A transducer measures physical quantities and transmits the information as coded digital signals rather than as continuously varying currents or voltages. ... Most transducers used in digital systems are primarily analogue in nature and incorporate some form of conversion to provide the digital output. 


1.  Absolute pressure is zero-referenced against a perfect vacuum, so it is equal to gauge pressure plus atmospheric pressure.

2.  Gauge pressure is zero-referenced against ambient air pressure, so it is equal to absolute pressure minus atmospheric pressure. Negative signs are usually omitted.

3.  Differential pressure is the difference in pressure between two points.

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A pressure sensor is an instrument consisting of a pressure sensitive element to determine the actual pressure applied to the sensor (using different working principles) and some components to convert this information into an output sign


A Sanitary Sensor is a device which measures temperature, flow or pressure in an environment where products will be for human consumption.

In typical industrial applications, measurements of parameters such as temperature, flow, level, or pressure simply involve finding a device with the right specifications that is designed to provide reasonable durability and a satisfactory life in its operating environment. The measurement range needed and special environmental concerns, such as exposure to corrosive liquids or gases help narrow down the choices.


The submersible pressure sensor is a special type of pressure sensor for hydrostatic level measurement in tanks, wells, shafts and bore holes. For this, the submersible pressure sensor is submerged directly in the liquid to be measured, and positioned as close as possible to the bottom.

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A temperature sensor is a device, typically, a thermocouple or RTD, that provides for temperature measurement through an electrical signal. A thermocouple (T/C) is made from two dissimilar metals that generate electrical voltage in direct proportion to changes in temperature.


GP:50 has a a bunch of Digital Line  of transmitters, Gauges, and other items like Signal Conditioners on their accessories page