SNDWAY SW-743A Halogen Leak Detector Refrigerant Gas Car Air Conditioner Refrigerator Freon CFCs HCFCs Halon Detector Meter SW-743A usage scenario: 1. Detection of halogen gases (such as chlorine and fluorine) 2. Detection of medical ethylene oxide, ethanol gas, etc 3. Detect halon gas in the fire extinguisher system 4. Testing of air conditioning, refrigeration systems, and refrigerant recovery devices 5. Gas detection: CFCs: R11, R12, R500, R503, etc HCFCs: R22, R123, R124, R502, R134A, R404A, R125, R600A, R407C, R23, R152A, etc Specification Range: 0-1000 PPM Resolution: 1 PPM Max sensitivity: R600A/R22 & T134A @0.5 ounce/year (14g/year) Preheating time (T90): 30s Response time (T90): less than 10s Sampling methods: diffusion Operating time: more than 6 hours Screen: LCD with backlight Direct reading: real-time data/ unit/ temperature Alarm Setting: low/ high concentration alarm function Alarm: sound/ led/ vibration/ under-voltage alarm Beep: higher beep frequency shows higher concentration Battery: 3x1.5V AAA (not include) Product dimension: 156x64x27mm