Upgraded 5 LED indicators reflect gas concentration.Freon leak detector triggers on R22, R134A, R404a, R410A and all halogenated refrigerants including HFCs, CFCs,HCFCs and blends.7 Adjustable Sensitivity; Maximum sensitivity is 0.21oz/yr.Response within 3 seconds; Warm up in 6 seconds; Audible alarm and low battery indicator.A flexible probe around 7.9-inch allows detections in difficult and hard-to-reach areas. 24/7 US Technician Support via Email and Phone. Product Description WJL-6000S is a corona HVAC leak detector with high sensitivity and visualized alarm display. Its adjustable sensitivity ensures automatic and optimal detection status， locating leaks much more accurately. It detects all halogen refrigerants including R134a, R410a, R12, R22, R600a, R404a, R1234yf. Concentration Indicator Once leaking gas is detected, the beep frequency will increase. The more gas leaked, the quickly the buzzer beeps. The first indicator will flash quickly meantime and the other four LEDs will light up accordingly based on the concentration of leaked gases.The first indicator indicates both leak and battery level. Blinks in orange mean low battery. Corona Sensor It will respond to all halogenated. This includes, but is not limited to: CFCs e.g.R12, R11, R500, R503 etc.HCFCs e.g. R22, R123, R124,R502 etc.HFCs e.g. R134a, R404a, R410a, R1234yf etc.Blends such as AZ-50. HP62. MP39 etc. 7 Adjustable Sensitivity 1-7 Grade selectable sensitivity Maximum sensitivity is 0.21oz/yr smaller leak, higher sensitivity grade More refrigerants, more rapidly beeps, faster indicator flashes Note: 2 beeps per second when the detector is open, 10 beeps per second when leak is detected) Audible and Visual Alerts LED light flash alarmBuzzer alarmDual-battery indicators Green - Suitable for job. Orange- Need to replace batteries asap. Flexible Probe Around 7.87-inch flexible probeAllows detection in difficult and hard-to-reach areas.Replaceable sensor tip, which makes the detection more accurate. 4AAA Batteries Battery life: about 50 hours Leak Detector equips with: Portable black bag to carry and storage Note: batteries NOT included Technical Parameters User Guide: Leaking areas are usually covered with contaminants such as compressor oil or dirt, so be careful not to let the sensor tip come in contact with these contaminants. Keep the sensor tip away from any moisture or other solvents to avoid false alarms. Package List: 1 x Detector 1 x Carry Bag 1 x User Manual Technical Specifications Sensor lifetime 24 hours Sensitivity range 7 levels Maximum sensitivity 6g/yr Response time < 3s Warm-up time 6s Reset time 2s Refrigerants CFCs / HCFCs / HFCs /HCs / HFOs Power supply 4 AAA alkaline battery(not included) Approvals Compliant to Standard: SAE-J1627, EN 14624 Operating temperature 0℃-52℃ (30℉ to 125℉); Overall size 9*2.6*2.6 in Probe length 7.9 in Sensor Type Corona Corona Corona Corona Heated Diode Infrared Battery Required 4 AAA 2 C 4 AAA 2 AA Li-1800mA/h Li-3000mA/h Sensor Life ≥ 24 hours ≥ 24 hours ≥ 24 hours ≥ 24 hours ≥ 500 hours ≥ 10 years Probe Length 7.87 inch 13.98 inch 7.87 inch 12.01 inch 14.37 inch 14.37 inch Sensing Tip 1 2 1 2 1 1 Concentration Indicator NO NO