CX-PG-SYMFX-100,150B Flange Diaphragm Explosion-proof 
Electric Contact Pressure Gauge
Note: this pressure gauge is normally closed type. Measuring the corrosive medium, crystallization and coagulation medium, should use acid proof, antiseptic or diaphragm explosion-proof pressure gauge; Measure tiny pressure (10 Kpa ~ 60 Kpa), should use diaphragm capsule  explosion-proof pressure gauge; Measure of vibration occasions use magnetic assist type explosion-proof pressure gauge or use digital explosion-proof pressure gauge.
  Ⅰ. Application
This instrument can use in the site that is with explosive mixture, used for measuring the copper and copper alloy, common carbon steel and other non-corrosive of crystals, non-solidification of medium’s pressure (negative pressure). Can use together with the relevant explosion-proof property electric element via contact device.
 
Ⅱ. Basic Parameter
1. Technical data

Instrument Name	Measuring Range	Accuracy	Contact Parameter
explosion proof electric contact pressure gauge	0 ~ 60 Mpa	1.5%	rated voltage AC380V DC220V rated current  1A contact power  10VA
explosion proof electric contact vacuum gauge	-0.1~ 0 Mpa
explosion proof electric contact pressure vacuum gauge	-0.1~ 2.4Mpa
Magnetic assist explosion proof  electric contact  pressure gauge	0 ~ 60 Mpa -0.1~ 0 Mpa -0.1~ 2.4Mpa		contact power  30VA
explosion proof electric contact pressure gauge	0~10~60Kpa	2.5%	contact power 10VA
digital explosion proof electric contact pressure gauge	0~10~600Kpa 0～100Mpa -0.1～ 0 Mpa -0.1～2.4Mpa	0. 5% 0.25%	contact power 5A（AC250V）

 
2. Dimension   100mm                                    dimension 150mm
  
  Ⅲ. Structure and Working Principle
 
1. This pressure gauge shell uses flame-proof structure, when the shell internal explosive mixtures affected by sparks or electric arc, when the explosion occurred, do not cause external explosive mixture explode, so as to achieve the goal of explosion-proof.
2. Instrument is consists by bourdon pressure gauge and an electric connect device.
Instrument working principle: when the medium get into the spring tube, make its produce displacement, enlarge through the drive mechanism, pointer will be indicate the measured pressure value in the dial. At the same time the pointer drive electric contact device’s movable contact, when the pressure reaches index value, movable contact contacts set pointer’s contact terminal, and processing circuit.
3. Insert line of rubber sealing ring inside diameter 10 mm, Shao Ershi hardness 45 to 55 with cable diameter 9.8 mm, 500 VBX type four core lastex (4XI)
4. Wiring
  
Electrical circuit diagram