Aqua Environment 853-1 Pressure Switch, Temperature Compensating

Features:

• The model 853-1 is the same as the 853 except it employs a temperature compensating element.
• It's primary purpose is to permit filling natural gas cylinders on a cold day without the danger of the cylinders becoming over-pressurized if moved to a warm area.
• Consequently the set pressure of the 853-1 decreases with temperature.