Floating relay RP-40, Sumy region.

The RP-40 float relay is designed to monitor the position of the liquid level with a temperature of 5 to 60°С and an ambient air temperature of 5 to 50°С in various types of tanks and to turn on or off signaling devices or actuators when the liquid level deviates from the set one.
Float relay RP-40 with water gauge glass.(//tractor-service.com)
The limits of regulation are from 20 to 150 mm.
The operating error of the contact device, mm ±20.
Hermetychnost, kgs/cm2 5