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Differential Gauges

Indicating type differential pressure switch with bellows element_P640 series (P641, P642)

P640 series (P641, P642)

Service intended

The P640 series are designed to measure differential pressure from 25 kPa to 2.0 MPa at static pressure 10 MPa and have electrical contact. A set of two stainless steel bellows mounted on a force balance allows direct reading of the actual differential pressure.

Nominal diameter 150 mm
Accuracy ±1.0 % of full scale
±1.5 % of full scale
Scale range (MPa, kPa, bar, mbar) 0 ~ 25 kPa to 0 ~ 0.25 MPa (P641 model)
0 ~ 0.4 MPa to 0 ~ 2.0 MPa (P642 model)
Static pressure Max. 10 MPa
Working temperature Ambient : -20 ~ 65 °C
Fluid : Max. 100 °C
Degree of protection EN60529/IEC529/IP55
Temperature effect Accuracy at temperature above and below the reference temperature (20 ℃) will be effected by approximately
±0.5 % per 10 ℃ of full scale

Standard features

Pressure connection Stainless steel (316L SS), Monel and Hastelloy-C
Element Bellows
Stainless steel (316L SS), Monel and Hastelloy-C
Case and cover ALDC12.1, Black painted Screwed type
Window Safety glass
Dial White aluminium with black graduations
Filling liquid for differential cell Silicone oil
Pointer Black painted aluminium alloy (Zero adjustable)
Contact Contact rating : AC 250 V 3 A / 125 V 5 A
DC 250 V 0.2 A / 125 V 0.4 A / 30 V 4 A
Dielectric strength : AC 500 V / MIN
Type : Micro contact, One and two SPDT
Conduit connection ¾" PF(F)
Process connection ¼" NPT(F)
½" NPT(F) at 3-way and 5-way manifold valve
Standard accessories Mounting bracket for 2" pipe
mounting with silver gray finished steel
Option ■ Remote seal - Not available with less than 40 kPa of differential pressure range
■ Mounting bracket with 316SS for 2" pipe
■ 3-way manifold valve (316SS, Monel)
■ 5-way manifold valve (316SS, Monel)

© WISE Control Inc. All rights reserved. ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE.

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