Normally open. Shut-off solenoid valves designed for pressure of up to 250 bar, intended for use with compressed natural gas, methanol, et c.
With manual control of liquefied natural gases, anhydrous ammonia and others with for pressure up to 25 bar
Two light emitters. Viewing angle ~360°. Single sound emitter. The unit might be programmed. Power voltage - 24 V.
Single sound emitter. Low power consumption (not more than 400 mW) Powe voltage from 6 up to 40 V.