Portable formaldehyde GAS Detector MODEL ATS-101M model ATS-101M is Portable Single/Dubel Gas Detectors are capable of detecting Oxygen, Toxic, and Combustible gases making them ideal for use in various environments. Compact, Light Weight Intelligent Unit with Application Specific Sensors Sensitive to PPB / PPM or % levels of Gases & amp; Vapors. FEATURES: Complete Automatic Operation. 128X64 Graphics Display Continuous Diffusion / Suction Sampling Confidence Beep every 15 seconds. Complete self Integrity check on start Automatic Calibration. Display of WARN & amp; ALARM Low battery Alarm. SPECIFICATIONS: Overall Ranges PPB / PPM / % V/V/% LEL Sampling Method Diffusion (D) or Suction (S) Principle Specific to Application (EC, NDIR, Solid State, Catalytic, PID) Sensor Life 2 - 5 years Measurement Continuous. Display 128 X 64 graphics Display (Reading, Alarm Icon & amp; low battery Condition) Resolution 0.01, 0.1 or 1 PPM, %V/V, % LEL as applicable. Accuracy +/- 2 % & amp; 0.5% for oxygen. Repeatability +/- 2 %. Response Time & lt; 30 seconds at 95 % variation. Alarms Low & amp; HI Visual and Audible (User Customized)) Humidity 0 - 9 5 % R H Power Supply 3.7 V DC Long Life Lithium Rechargeable Battery Battery Life 6-8 hours. Housing & amp; IP High Impact Plastic. (ABS), Ingress Protection:IP68 Size & amp; Weight 115(H) X180(L) X 60(D); 300 GM. Temperature Range -30 to 55 Deg. C. Warranty One year. The instruments emits an audible beep every 15 secs that provides confidence to the user that he is well protected. Audio, Visual also Warn and Alarms protect him from hazardous situations. The Warn and Alarm Values are factory set. Low Battery Alarm alerts the user to replace or recharge the Battery. Special features like maximum exposed concentration and TWA readings can be incorporated