Very Low Range
Variable Reluctance Pressure
Transducer Validyne DP45

Very Low Range Variable Reluctance Pressure Transducer

Description
Applications
Specifications
Theory of Operation
Installation & Operating Instructions
Trouble-Shooting Guide
Diaphragm Range Chart

Very Low Range Variable Reluctance Pressure Transducer Description:

The Very Low Range Variable Reluctance Pressure Transducer Validyne DP45 is designed for pressure measurement in the range of +/-1 inch H2O. This transducer is used extensively in connection with flow measurements where dynamic response at low flow rates is required. Dynamic response is maximized by a combination of low internal volume, symmetrical construction and the small volumetric displacement inherent in variable reluctance design.

All surfaces exposed to the media are corrosion resistant 410 stainless steel. The design of the Very Low Range Variable Reluctance Pressure Transducer Validyne DP45 permits the user to disassemble the instrument for cleaning, diaphragm replacement or changing the full scale pressure range.

When used with a companion carrier demodulator, the DP45 will produce an output of +/-10 Vdc for pressures as low as +/-0.6 inches H2O. The Very Low Range Variable Reluctance Pressure Transducer Validyne DP45 includes 10 feet of cable and an electrical connector as a standard option. Other cable lengths and extension cables are available.

Applications for the DP45:

• Pulmonary Pressure and Flow

• Low Differential Pressure Measurement in Clean Room Applications

Very Low Range Variable Reluctance Pressure Transducer Specifications:

Ranges: +/-0.6 to 90 In H2O
Accuracy: +/-0.5% FS
Hysteresis: 0.25% pressure excursion
Overpressure: 15 psig
Line Pressure: 15 psig
Output: +/-20 mV/V
Inductance: 20 mH, each coil
Zero Balance: Within +/-5 mV/V
Excitation: 5Vrms, 3khz to 5khz
Pressure Media: Liquids and Gases Compatible With 410 SST
Temperature Range: 0 to 160 deg F
Temp Effect on Zero: 1%FS/100 deg F
Temp Effect on Span: 2%FS/100 deg F
Pressure Cavity Volume: 0.01 Cu In
Displacement at FS: 0.001 Cu In
Pressure Connection: 1/8 Inch Female NPT
Electrical Connection: PT02A-10-6P Bendix or equal

Validyne DP45 Diaphragm Ranges