An industrial-grade gas leak analyzer
  • Standard model detects all CFC, HFC and HCFC refrigerants as low as 0.03 oz/yr (0.85 g/yr)
  • Models available for R-290 (propane), R-744 (CO2), R-600a (isobutane) and SF6
  • ALQ™ technology eliminates the need for a calibrated reference leak source


The H25-IR PRO is the latest industrial-grade gas leak analyzer capable of detecting 40+ refrigerant gases (standard model) in addition to R-290 (propane), R-600a (isobutane) and for special applications, CO2 and SF6. It uses Bacharach’s patented Advanced Leak Quantification (ALQ™) technology to quickly detect andquantify leaks, making this analyzer a truly powerful tool.


The H25-IR PRO has many probe options, ranging from basic all the way to a “smart” probe that mirrors the instrument’s user interface. Probes are available in 6 and 12 ft. lengths, enabling the H25-IR PRO to be customized to specific applications and user requirements. It also includes four (4) relays and a 4-20mA output and comes with a 2 year warranty.



Gases Measured

Standard model: all CFC, HFC and HCFC refrigerants, including but not limited to: R-11, R-12, R-21, R-22, R-23, R-32, R-113, R-114, R-123, R-124, R-125, R-134a, R-227, R-236fa, R-401a, R-402a, R-402b, R-404a, R-407a, R-407c, R-408a, R-409a, R-410a, R-422a, R-422d, R-424a, R-426a, R-427a, R-438a, R-500, R-502, R-503, R-507, R-508b, HFP, H-1211, HFO-1234yf, H-1301, H-2402, N-1230, FA-188 and FC-72


Other models: one of R-290 (propane), R-744 (CO2), R-600a (isobutane) or SF6 (gas type chosen by P/N configuration – see ordering information)

Measurement Range

Standard and SF6 models: 0.03 to 3.49 oz/yr (1 to 99 g/yr)

R-290 and R-600a models: 0.11 to 3.49 oz/yr (3 to 99 g/yr)

CO2 models: 5-500 ppm above ambient


Standard and SF6 models: 0.03 oz/yr (1 g/yr)

R-290 and R-600a models: 0.07 oz/yr (2 g/yr)

CO2 models: 5 ppm above ambient

Response Time

< 1 second (typical, dependent on probe length)

Leak Indicators

Visual (instrument display and smart probe, if equipped) and audible (via internal speaker or headphones)

Automatic Background Adjustment

Yes, in search mode


100 to 240 VAC, 50/60 Hz

Size (H x W x D)

Unit: 15.5 x 10.8 x 4.0 in. (39.4 x 27.3 x 10.2 cm)

Probe: 6 or 12 ft. (see ordering information)


18.0 lbs. (8.2 kg)

Operating Conditions

32 to 122 °F (0 to 50 °C), 5 to 90% RH (non-condensing), 1 ATM

Warm-up Time

1 minute


CE mark; UL/CSA/IEC/EN 61010-1


2 years