Ammonia alarm with LCD digital display, can be easily and quickly detect the concentration of ammonia. SNT200S type ammonia alarm major technical indicators: ⒈ detect gases: ammonia ⒉ Detection Mode: Diffused ⒊ Detection range: 0-100% LEL ⒋ Display: LCD digital display ⒌ Alarm: sound and light alarm ⒍ Alarm volume: 70dB ⒎ alarm settings: 20% LEL (adjustable) ⒏ basic error: ≤ ± 5% FS ⒐ Response time: ≤30s ⒑ proof type: intrinsically safe ⒒ proof mark: Ex iaⅡCT3 ⒓ Power: Rechargeable battery 4.8V ⒔ continuous Work:> 8h (standard charge state) ⒕ Environment: Temperature -40 ℃ ~ + 70 ℃ Humidity ≤93% RH ⒖ Dimensions: 220mm × 95mm × 50mm SNT200S type ammonia alarm features: ★ imported electrochemical sensors; ★ stable, sensitive and reliable, long life; ★ in good anti-toxic, anti-jamming capability; ★ automatic correction of zero, to avoid long-term zero drift caused by measurement error; ★ concentration signal output can be set multiple alarms; ★ current protection, reverse polarity protection; ★ RS485 communication interface, and the production of SNK series controller supporting the use; ★ wide operating voltage range: DC10V ~ DC30V.