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Pressure gauge with diaphragm seal


P761 (Pressure gauge with inline type diaphragm seal)
P762 (Pressure gauge with extension type diaphragm seal)
P763 (Pressure gauge with pad type diaphragm seal)


Service intended


Pressure gauge with diaphragm seal are suitable for the situation where the process medium would corrode the instrument connection and pressure sensing element. Furthermore, this type of gauge is suitable for corrosive, highly viscous, crystallising or hot pressure media. Additionally, it is recommended to be used where the process medium might freeze or solidify the instrument connection and pressure sending element due to the ambient or process temperature change and where the process medium requires the flusing from the system to prevent any contamination.




Internal diaphragm




Refer to gauge model


Suitable pressure range (MPa, kPa, bar)


-0.1 ~ 0 to -0.1 ~ 2.5 MPa
0 ~ 0.1 to 0 ~ 35 MPa


Filling liquid


Silicone oil


Working temperature


Temperature rating of the diaphragm seals depends on the fill fluid, the diaphragm material and the lower housing material. Standard fill fluids are available for temperature range -20 ~ 200 ˚C


Diaphragm material


Diaphragms are available in many corrosion resistant materials. Compatibility of selected material and process fluid is the responsibility of user


Temperature effect


Accuracy at temperature above and below the reference temperature (20 ˚C) will be effected by approximately
±0.5 % per 10 ˚C of full scale



Standard features


Upper flange (Gauge side)


Stainless steel (304SS, 316SS)




316L SS, Monel, Hastelloy-C Titanium, Tantalum, Nickel, Alloy20


Under flange and process flange


Stainless steel (304SS, 304L SS, 316SS, 316L SS) Monel, Hastelloy-C, Titanium, Nickel




Diaphragm and under flange are available in PTFE coating Under flange (Process side) are available in purging
plug or heating/cooling jacket




White aluminium with black graduations




Black painted aluminium alloy



Download:  CATALOG 

Đồng hồ áp suất màng P761 P762 P763

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