Specifications Model: SA104 Sensor: electrochemical sensor from Nemoto, Made in Japan, 5 years lifetime Detection range: 0～1000ppm Alarm point: 50ppm Alarm Type: Audible, Visual Resolution: 1 PPM Response time: T<20s Accuracy: ±5% of reading LED indicator: Blue power supply light and Red alarm light Operating Temperature: 14℉～140℉ (-10℃～60℃) Working humidity: 10% ~ 90%RH Power Supply: 2*CR2032 The lifetime of batteries: Continuously working for about 9 months Included Accessories: Metal chain lanyard, plastic protective Size: 3*1.9*0.6 inch (76*49*14.7 mm)" Weight: 1.8 ounces (50.8g)
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