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 problems. Features: stainless steel structure, explosion proof, built-in ccd component, zoom lens, compatible with various video surveillance, fiber optic transfer Application With the adoption of stainless steel explosion-proof enclosure and built-in ccd components, zoom lens, power module and optical transceiver etc, when cooperated with various types of video surveillance system, this camera is applied to monitor the job site where there is flammable and explosive gas mixture, such as coal mining, petro chemical plant, gas station etc. Camera parameters: color / black and white automatic conversion 1/3 inch ccd Minimum illumination: 0.1lux 480 Optical equipment parameters : single-mode st interface single-channel video Wavelength: 850nm/1310nm Lens parameters : color / black and white automatic conversion 1/3 inch ccd Manual aperture lens: 4mm/6mm/8mm/16mm Power modules : in ac(86 Transmission distance : Explosion protection : exd i Protection grade : ip68 Dimensions of sight glass : Dimensions: 370 Weight : 6 kg Swaying speed: pitch: 9 Wiper: yes Standard packing box and high hardness carton and wooden box