Variable Reluctance Pressure Sensor with 17-7 PH Wetted Parts
The Module DP215 Differential Pressure Transducer is exssentially the same as the Model DP15 except that the material used for the transducer housing and diaphragm is 17-7 ph stainless steel rather than type 410, for improved long term compatibility with corrosive pressure media, such as saline solutions, sea water, etc.
Like the DP15, the DP215 features take-apart construction with a wide range of interchangable sensing diaphragms that may be exchanged in the field, covering full scale pressure ranges from ± 8 psid through ± 3200 psid. Thanks to the exclusive Validyne diaphragm sizing procedures, the user can select a diaphragm – or a
transducer, for that matter – to cover virtually and full scale pressure range between the minimum and maximum limits for the model (see the Pressure Range/Diaphragm Selection Chart or the reverse side of this data sheet for details), without compromising the accuracy of the measurement.
Other features include:
· All surfaces in contact with the pressure media are stainless steel, Inconel-X or the O-ring compound selected (see Ordering Information for available choices), in both the postitive and negative cavities, thus eliminating the need for isolating diaphragms and fluids (a trus “wet-wet” design).
· Total diaphragm deflection for full scale pressure change is less than 0.0015”, resulting in extremely lowe volumetric change, and corresponding high dynamic response characteristics.
· Equal volumes in both the positive and negative pressure cavities ensure truly symmetrical preformance in bidirectional differential meaurements.
· A bleed port is provided in each pressure cavity to eliminate undersirable entrapped air in liquid measurements.
- General Specifications
|Standard Ranges||+/- 8 psid FS to 3200 psid FS|
|Accuracy||+/- 0.25% FS (including effects of linearity, hystertic and repeatability)|
|Overpressure||200% FS up to 4000 PSI maximum, with less than 0.5% zero shift|
|Line Pressure||3200 psig operating|
|Line Pressure Effect||Less than 1% FS zero shift/1000 psig|
|Output||35 mV/V full scale nominal|
|Inductance||20 mn nominal, each coil|
|Zero Balance||Within 5 mV/V|
|Excitation||Rated: 5 Vrms, 3 kHz to 5 kHz; Limited: 30 Vrms at 3 kHz, 1kHz to 20kHz with 20 mH coils|
|Pressure Media||Corrosive liquds and gases both sides, compatible with 17-7 ph stinless steel and Inconel|
|Temperature||Operating: -65 F to 250 F; Specified: 0 F to 160 F|
|Thermal Zero Shift||1% FS/100 F typical|
|Thermal Sensitivity Shift||2%/100 F typical|
|Pressure Cavity Volume||4 x 10-3 cubic inch|
|Volumetric Displacement||3 x 10-4 cubic inch for full scale|
|Pressure Connection||1/8 - 27 NPTF|
|Electrical Connection||PT02A-10-6P, Bendix or equivalent. Mating connector PT06A-10-6S (SR) not furnished|
|Weight||12 ounces (.34 kg)|