you must use the 383-500-620 maintenance kit to ensure proper component sizing and fit

the 500 series should be used instead

It fits Series 1

consistency and ease of field calibration are paramount

Honeywell Analytics E3SM Gas Detector Refrigerant you must use the 383-500-620The Honeywell Analytics E3SM Gas Detector is a high performance, wall mounted monitoring solution engineered for industrial gas detection in demanding environments. This standalone or network enabled unit operates on 24Vac 24Vdc power and is designed to interface seamlessly with modern building automation systems. The E3SM features dual gas detection capabilities, allowing for an internal sensor and an additional remote sensor to monitor separate