Heated Diode Refrigerant Leak Detector

Detects all refrigerants (CFC, HFC’s, HCFC, HFO’s) including HFO1234YF, HFO1234ZE, R410a & R22

Designed to meet EN14624, SAE1627, SAE2791 and SAE2913 standards


  • Detects all HFC, CFC, HCFC, HFO, H2N2 (Tracer Gas) and blends
  • Display Red 5-digit, green status LEDs
  • Relay Three relays, SPDT, user assignable Rating 2A @ 30VDC NO, 0.5A @ 125 VDC, 0.25A @ 250VAC, 30W, resistive load
  • Response Time: <1 seconds typical
  • Recovery Time: <10 seconds typical
  • Digital Outputs Modbus RTU via RS 485
  • Range 0-3500 ppm
  • Temperature Rating -22° to 104° F (-30° to 40° C)
  • Analog Outputs 4-20 mA; 0-5 V; 0-10 V; 1-5 V; 2-10 V(Default 1-5V)
  • Relay 1 relay rated 1 A @ 24 VAC/VDC(0.5A, 125V AC UL rating)
  • Range 0-3500 ppm

Salient Features

  • Detects R-134a, R-404A, Freon R-407C, R-410A and R-22 (per EN 14624)
  • High / low sensitivity per SAE J1627 rating criteria
  • Audible and visual alarms
  • Easily select high, medium and low sensitivity levels
  • Designed to meet EN14624, SAE1627, SAE2791 and SAE2913 standards
  • Responds to blends such as R410A and R407
  • Detects halogen gases in fire-extinguishing systems
  • Water Resistance: Designed to IP54
  • Fault Monitoring Fault codes presented to user

A Heated Diode Refrigerant Leak Detector is a specialized device used for detecting leaks of refrigerant gases in HVAC (Heating, Ventilation, and Air Conditioning) and refrigeration systems. Unlike infrared leak detectors, which rely on the absorption and emission of infrared radiation, heated diode detectors work on a different principle involving a heated sensing element, continuously monitors indoor or outdoor ambient air for refrigerants, oxygen and toxic and combustible gases.

Heated Diode Refrigerant Leak Detector efficiently detects the below listed refrigerants with high accuracy.

  • HFC’s (R134a, R410A, R407C, R417A, R404A, R507, R23, R508B, R152a, R32)
  • HCFC’s (R22, R123, R124, R141b, R142b, R402A, R402B, R408, R409)
  • CFC’s (R11, R12, R13, R500, R502, R503)
  • PFC’s (PFC-14, PFC-116, PCF-218)
  • HFO’s (R1234yf)


  • HVAC System Maintenance
  • Refrigeration Units
  • Automotive Air Conditioning
  • Commercial Refrigeration
  • Industrial Refrigeration
  • Refrigerant Recovery and Recycling
  • HVAC Retrofitting

Standards and Certifications

  • CE Marked
  • UL Listed
  • CSA Standards
  • IEC EN 61010-1 Standards
  • EN14624 Standards
  • SAE J1627 Standards
  • MET/IEC/EN 61010-1

Also check out Infrared – IR Refrigerant Leak Detector and Infrared – IR Toxic Gas Detector.