Our product all have obtain governments approval Explosion proof certificates,quality is 100% guaranteed in flammable environments,such as petro chemical,oil tank and mining,gas station,medicine,army,oil plant etc.Our product could realized safety monitoring this explosive environments,also our corporation offer whole line technical support and installation assistance,we offer 1 month return and 1 year free requirements because of our quality problemsCOAL MINE FIBER-OPTIC EX-PROOF CAMERA is coal mine flameproof fiber optic video camera,(hereinafter referred to as a video camera), image uptake and transfer for downhole important

place, for containing explosive mixture of methane and other gases, with a risk of explosion coal mine. Product performance standards for the Q / ZMD 002-2009 "mine flameproof fiber optic video camera" and GB15465-1995 "

Environmental conditions:

ambient temperature of -5 ° C to +40 ° C;

Mine atmospheric pressure 80 ~ 106Mpa

altitude does not exceed 2000m;

air relative humidity less than 95% (25 ° C );

gas coal dust explosion hazard sites;

non-corrosive gas destroy, insulation or vapor spaces;

in the absence of significant places of vibration and shock;

pollution degree 3;

Installation category is Ⅲ.

Main technical parameter:

Rated voltage: 127V;

the output light signal wavelength: 1310 nm;

output optical signal power: ≥-20dBm

receiving sensitivity: ≥-24dBm

Definition: ≥ 520 lines

Minimum illumination: ≤ 1.0Lux

transmission distance : 25 km.

Btw,I'd like to draw your attention that now all the ex-proof cameras all could work via worldwide server like normal cameras, you can connect it whatever and 7*24hours via cellphone and computer,also could make POE in ex-proof field, I believe all this new technology in ex-proof could have good market.