The D420 features powerful electrolyte sensor technology designed to detect more common and
Problematic HFC refrigerants such as R-134a, R-410A, R-404A, R-407A and R-507 in addition to the new refrigerants
HFO-1234yf and all HCFCs (R-22) and CFCs (R-12) including SNAP approved hydrocarbon blends.

D420 does not require rechargeable batteries.

Detects all CFCs, HFCs, HCFCs and HFOs
Certified design meets European standard EN14624
Low battery indicator
Silence function
CE certified
Long-lasting, stable sensor
Automatic calibration and reset to ambient temperature
Three adjustable sensitivity levels
Fully mechanical pump
Operates on four AA alkaline batteries
Comfortable rubber grip

Specifications

Sensitivity 1 g/yr R134a, 1 g/yr R1234yf
Sensor life > ten years
Response time Instantaneous
Power supply Four AA alkaline batteries
Battery life Approximately 4 hours
Warm-up time <20 seconds
Probe length 43 cm (17 inches)
Weight in grams 680