Differential pressure gauge with reed switch

Type: P680


Service intended


P680 series are differential pressure gauge is designed to measure differential pressure from 25 kPa to 2.0 MPa at static pressure 10 MPa. A set of two stainless steel bellows mounted on a force balance allows direct reading of the actual differential pressure. The contacts uses a reed switch for warning and control applications.


Nominal diameter


150 mm




±1.0 % of full scale
±1.5 % of full scale


Scale range (MPa, kPa, bar, mbar)


0 ~ 25 kPa to 0 ~ 0.25 MPa (P681 model)
0 ~ 0.4 MPa to 0 ~ 2.0 MPa (P682 model)


Static pressure


Max. 10 MPa


Working temperature


Ambient : -20 ~ 65 °C
Fluid : Max. 100 °C


Degree of protection




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 (316SS), Monel and Hastelloy-C




Stainless steel (316SS), Monel and Hastelloy-C


Case and cover


ALDC12.1, black painted Screwed type




Safety glass




White aluminium with black graduations


Filling liquid for differential cell


Silicone oil




Black painted aluminium alloy (Zero adjustable)




Reed switch, One and two SPST


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




■ Remote seal - Not available with less than 40 kPa of differential pressure range
■ Mounting bracket with 316SS for 2" pipe
■ 3-way and 5-way manifold valve
■ 3-way and 5-way manifold valve (Monel)



Download:  CATALOG 

Đồng hồ Công tắc áp suất chênh áp P681 P682