502/7DZ Dual Contact Pressure Controller

 The controller adopts bellows type sensor, which can be used for neutral gas and liquid medium.

 The setting value of the controller is adjustable, and the adjustment range is


 It can be used for air, gas, water, water vapor, refrigerant, oil and other media.

  • Price Term: FOB/CIF/EXW/DAP
  • Package: Exported Wooden case or according to customer request
  • Delivery Time:  7 to 10 working days
  • Transports: By sea, by air, by high express
  • Shipment Port: Shanghai Port
  • Origin of Place: Jiangsu
  • Warranty: 12 Months
Operating Viscosity <1×10-3m2/s
Switching Elements Micro Switch
Protection Class IP54
Ambient Temperature -40℃ ~50℃
Medium Temperature 0℃ ~120℃
Installation Position Pressure connection vertical down (15°tilt allowed)
Vibration Resistance Max 20m/s2
Repeatability Error ≤1%
Synchronicity Error ≤0.5% (refers to the synchronization error of the lower switching value ①)
Contact Capacity  AC 220V 6A (resistive)  600VA

502/7DZ Switching Difference Is Not Adjustable

Set Value





Difference Is Not Greater Than


Maximum Allowable Pressure


Switching Times


Pressure Sensor Materials Interface Female Thread W


Dimension Drawing No.
Housing bellow
-0.1~0 0.011 1 20 Brass Stainless steel




G1/4″ 1.4 01
-0.1~0.1 0.012
-0.1~0.16 0.015
-0.1~0.25 0.018
0~0.1 0.012
0~0.16 0.015
0.01~0.25 0.015
0.02~0.4 0.045 2 1.25 02
0.03~0.6 0.054
0.03~1 0.06
0.05~1.6 0.12 5 1.3 03
0.05~2.5 0.15


①The requirement for synchronization of the upper switching value should be specified in the order.

②In actual operation, even brief pressure peaks should not exceed this value.


Controller Selection And Installation Instructions

See controller selection and installation for details


Adjustment Of The Set Value

See the adjustment of the set value of the pressure controller example 1 and example 2


Pressure Controller


Pressure Controller


Pressure Controller

Pressure Controller

Single knife double-throw micro switch process:

Wiring terminals 1-2,4-6 Pressure rise to the upper switching value is disconnected;

Wiring terminals 1-3,4-6 Pressure rise to the upper switching value is turned on.

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