Temperature compensated pressure switch

This product is installed in Gas Insulated Switchgear (GIS) and Gas Circuit Breaker (GCB) of nuclear / thermal / hydraulic power stations to monitor the pressure and density of SF6 gas that is an electric insulating medium for 24 hours.  In the present world in which a great deal of attention is attracted to global warming and environmental destruction, the demand for this product to monitor the emission of SF6 gas specified as greenhouse effect gas to the air is gradually increasing both in Japan and overseas。

Catalogue (PDF)

Example for setting pressure

Unit:MPa   Setting temperature:20℃

Rated pressure 1st contact (lower limit) 2nd contact (lowest limit)
0.35 0.30 ±0.02 0.25 ±0.02
0.50 0.45 ±0.02 0.40 ±0.02
0.55 0.50 ±0.02 0.45 ±0.02
0.60 0.55 ±0.02 0.50 ±0.02

Main specifications

1)Ambient temperature -20℃~+40℃
2)Temp. compensation range -20℃~+60℃
3)Indication accuracy ±1% F.S. (at +20ºC)
4)Scale range (example) -0.1MPa(-76cmHg)~1MPa
5)Contact mechanism Magnet assist type (2 lower limits)
6)Contact capacity more than 0.05A at 250V AC, more than 0.1A at 125V AC(inductive breaking current)
more than 0.13A at 250V DC, more than 0.26A at 125V DC   (non-inductive breaking current)
7)Max. allowable gas leakage 1 x 10-9 Pa・m3/s or less
8)Operating environment Both indoors and outdoors
9)Weight Approx. 1.7 kg