The model 3370 is no longer available but it has been replaced with a different model switch monitor.
Pin for pin compatibility – Depending on the use of pin 4, either model 3380 or model 3380-C can be used to replace the 3370 series controls with no modification to wiring.
Model 3380 replaces models 3370 and 3370-M, if the normally closed contact (pin number 4) on the 3370 is not being used.
Model 3380-C replaces models 3370 and 3370-M, if the normally closed contact (pin number 4) on the 3370 is being used.
Model 3381 replaces model 3371.
