QB2000 Ammonia(NH3) alarm controller is consisted of alarm controller and gas detector etc; it can work together with various gas detector, is easy to fix; it realized the detection for 8, 16 or 32 physical quantity, displaying, and public alarm control. When the detected gas density in the air reaches or exceeds the preset value, the controller will give out audio-visual alarm immediately to remind you take safety precautions and start exhaust, control and start exhaust or other peripheral devices to avoid explosion, fire, toxicosis to protect the safety of life and treasures. This system applies to metallurgy, petrol, petrifaction, chemistry, light industry, coking, municipal administration, gas, pharmaceutical, sewage dealing and many other special industry and field that need proofing for fire, explosion, and toxic gas leakage. Characteristics: ◆high-performance sensor ◆ 128*64 dot matrix big screen liquid digital display ◆ Chinese interface setting and operation ◆ various gas mixed together to fix ◆ display the detected gas density in long distance ◆ high sensitivity, and quick response ◆ Automatic compensation for temperature drift and time drift ◆ The up and low alarm points of each channels can be set separately ◆ RS485, RS232 communication port can upload data to computers ◆printing the alarm data on site is optional Detect gas: Ammonia(NH3) Alarm setting : alarm point for density of class one program setting alarm point for density of class two: program setting Alarm method: audio-visual alarm Alarm volume: > 120 decibel Alarm output: passive contacts, capacity AC220v 5A Temperature: -10℃~ 50℃ Humidity : < 90% no moisture condensation Defending class: IP44 Power : AC220V,50HZ <10W Transfer distance : 1000m < 1.5mm2 copper wire