1996-20 Gas - Air pressure switch. Connections, size and visual open - off indicator as shown. Note that the set point adjustment window. To adjust the switch settings, turn the top of the screw until the red rods reach the desired set point. A complete description provided with the product. Reliable and convenient 
 1996-20 and 1996-5 gas pressure switch is the one for the gas burner and equipment small volume, low-cost switch. Wide and 2 "to 20" Pressure range for high / low gas pressure interlock. Visual set point and ON - OFF indicator for the switch adds convenience. SPDT switch is normally open or normally closed contact. The bottom of the connection with the pipe joints or couplers 1/8 "female thread and 1/4" male connection. At the top to connect the same diaphragm chamber with the outside world or the boiler combustion chamber. This pressure switch can be used in the days of flammable gas, artificial gas, or LP gas. 

 Physical data 
 Temperature Range: 32 ° F (-30 ° F dry gas or air) to 110 ° F 
 Fluctuations in the maximum pressure: 10 psig 
 Pressure Rating: 45 in. water column 
 Pressure Connection: 1/8 "female NPT or 1/4" male NPT 
 Ventilation holes to connect: 1/8 "NPT 
 Electrical rating: 15 amps, 120-480 volts, 60 Hz, AC resistive 1/8 HP _AT_ 125 volts. 1/4 HP at 250 volts., 60 Hz AC 
 Wires: 3 screw type, common, regular type, and NC 
 Set Point Adjustment: Screw type, with visual instructions in the package. 
 - Off indicator: located outside the window within the package. One can see that the pressure is above the set point. 
 Housing: Cast aluminum housing with anti-corrosion chemical coatings. Galvanized steel sign. 
 Diaphragm: Molded nitrile rubber 
 Calibration spring: stainless steel 
 Weight: 1 lb. 2 ozs.