Monthly Archives: June 2015

Validyne “Senses” the Change in the Pressure Sensor Market & Reveals New Innovations


Validyne “Senses” the Change in the Pressure Sensor Market and Reveals New Innovations

Northridge, CA – June 30, 2015 – Validyne Engineering releases two new product lines for hydraulic pressure and low pressure air flow systems.

Validyne is proud to announce two new product lines to meet the demands of the evolving sensor market.

The two new product lines will give OEM users of pressure sensors the option to choose variable reluctance sensing technology for their applications at an attractive price point. The first new product line offers feature-rich enhancements for our OEM clients. The second new product line offers a streamlined set of features compared to their traditional line, but a lower cost.

Compact form factor combined with a rugged sensor that accepts air, inert gases and hydrocarbon-based liquids are important elements in this new low cost product line. Target audiences include those requiring hydraulic pressure measurement, low pressure air flow systems and any application involving pressures below 5 In H2O.

According to Paul Muller, Validyne’s Director of Sales & Marketing “Validyne is reaching out to the OEM market to provide low cost differential pressure sensors capable of accepting liquids and gases.”

A World Leader in Variable Reluctance Technology (VRT) since 1968, Validyne has a long history of providing standard and custom solutions to the Aerospace, Automotive, and Engineering industries.

Technical Specs for New Products:

Model P17: For air and inert gas applications Full Scales as low as 0.1 In H2O DC Power/DC Signal 0 to +5 Vdc signal

Model P20: For Liquids and Gases Static Pressures to 1000 psig Differential Ranges as low as 0.1 psi full scale DC Power/DC Signal

Model P25: For Liquids and Gases Static Pressures to 10,000 psig Differential Ranges as low as 5 psi full scale DC Power/DC Signal

Models P117, P120 and P125 are similar in functionality from those listed above, but are constructed without a housing for electronics – for use inside the customer’s own unique enclosure.


Validyne Engineering Inc., headquartered in Northridge, Calif., has a diverse customer base that ranges from automotive and engine manufacturers, to research and development labs, to aerospace companies. For more information on Validyne or to find out more about the new VPAS Pressure System, please visit, send us an e-mail at, or reach us by calling (818) 886-2057

Stand-Alone Pressure Transducer or Sensor + Electronics?


Validyne pressure transducers break down into two general categories:

Type 1 – A complete transducer with integral electronics

pressure transducer






Type 2 – A variable reluctance sensor and supporting carrier demodulator electronics.

pressure transducer







Type 1 category products include models P55, P61, P66, the P895 family and the DR800 and P532 process transmitters.

Type 2 category products include models DP15, DP360/363, DP103 with carrier demodulator models CD15, CD23/223, CD280 and CD17.

The transducers in both categories measure the same pressure ranges – so why would you choose one type over another?

Cost Effective DC Power and DC Signal:

Type 1 category transducers are generally more cost effective per point than are the sensor + electronics (Type 2) category. The Type 1 products come ready for DC power and produce a high-level DC signal, +-/5 Vdc or 4-20 mA. The Type 1 transducers include temperature compensation and are also available with higher accuracy because we can program corrections to sensor errors into the microprocessors in these products.

Type 1 products are generally ‘plug and play’ devices and are ideal for permanent installations.

Type 1 products, however, do not lend themselves to the changing of pressure ranges easily. It is possible to disassemble the sensor on a P55, for example, and replace a damaged diaphragm or install a diaphragm with a new range – but the correction factors and temperature compensation in the microprocessor will not be matched to the new assembly. Validyne can do this – and include new temperature compensation and error correction factors – but this takes time and has a cost.

Easy Range Changing:

The biggest reason to use Type 2 products is for convenient range changing. A DP15, for example, will be easier to disassemble and easier to replace a diaphragm than the Type 1 units. The sensor will be easier to calibrate with the zero and span adjustment ranges built into the external carrier demodulators. If fast frequency is important, the smaller variable reluctance sensors can be more conveniently close-coupled to piping than the larger Type 1 units and the electronics supporting Type 2 sensors have a higher low pass filter frequency available – up to 1 Khz.

Type 2 products are best suited to laboratory settings where pressure ranges are frequently changing, where a digital display is needed and where installation flexibility is important.

Type 2 products, however, do not have built-in temperature compensation, must be calibrated by the user with an appropriate pressure standard and are generally more expensive per measurement point.