... leak detection, pinpointing leak points, concentration measurement and explosion-proof. It goes through the full-range measurements from 1ppm ... , 10+ hours continuous.Data storage: SD card storage (512M)Data transfer: RS232Explosion Proof Standard: EX e IIC T6Water proof level ... :Mainframe, hand-held probe, charger, belt, water-proof and dust-proof filter, cup probe, carrying case, User’s Manual ...