Selection guide:

C437D1005/U

Pressure Switch, Manual Reset, 1 in. wc to 26 in. wc

C437E1004/U

Pressure Switch, Manual Reset, 1 in. wc to 26 in. wc

C437E1012/U

Pressure Switch, Manual Reset, 1/2 psi to 5 psi

C437E1038/U

Pressure Switch, Manual Reset, 1/2 in. wc to 5 1/2 in. wc

C437F1003/U

Pressure Switch, Auto recycle, 1 in. wc to 26 in. wc

C437F1011/U

Pressure Switch, Auto recycle, 1/2 psi to 5 psi

C437F1029/U

Pressure Switch, Auto recycle, 1 psi to 10 psi

C437F1037/U

Pressure Switch, Auto recycle, 1/2 in. wc to 5 1/2 in. wc

C437F1060/U

Pressure Switch, Auto recycle, 1 psi to 10 psi

C437F1078/U

Pressure Switch, Auto recycle, 1/2 in. wc to 5 1/2 in. wc