The INIR4-R32 is a user-friendly digital gas sensor utilizing Non-Dispersive Infra-Red (NDIR) technology, specifically designed for R32 refrigerant leakage detection in both industrial and residential environments. The sensor features factory calibration for up to 7% R32 with high resolution up to 0.04% LFL, temperature compensation across -20°C to +60°C, and a detectivity level at 0.14% LFL. It incorporates serial port communication (38400 baud default), PWM output (100 Hz, 10-90% duty cycle), and configurable alarm output, with typical power consumption below 100 mW in measurement mode and 30 mW in standby mode. The sensor meets UL 60335-2-40, IEC 60079-29-1, and IEC 60335-2-40 requirements, making it ideal for heat pumps, refrigeration systems, chill cabinets, vending machines, cold storage systems, and air conditioning applications requiring F-gas and Kigali Amendment compliance.