1. Product specifications:
Large LCD display: 3.5' (8.9cm) LCD display with backlight
Logger mode: keystart/stop, immediately, schedule, real-time & roll-over carbon dioxide (CO2)
Range: 0-9999 (out of scale)
Accuracy: ±50ppm±5%rdg (0-2000)
Response time: 10sec
Temperature range: -10.0-70.0°C (14-158°F)
Resolution: 0.1°C/°F
Accuracy: ±0.6°C/±0.9°F (0-50°C/32-122°F), others±1.2°C
Humidity range: 0.1-99.9%
Resolution: 0.1°C/°F
Accuracy: ±3%(10-90%)
Logging memory: 40000
Operating condition: 0-50°C, 0-95% RH
Storage condition: -20-60°C, 0-99% RH
Sensor life: 15 years in normal comm.
Environments with ABC on
Storage temperature: -40-70°C(-40-158°F)
Power supply: 1A output 9VAC adaptor

2Features:
•Super large LCD simultaneously display and log C02 level, temperature, relative humidity, calendar(Y/M/D) and time(clock)
•Digital wall mountable/desk top type
•40000 data logging memory
•Warning carbon dioxide level
•Stable ND IR sensor for CO2 concentration
•NDIR(Non-dispersive Infrared) wave guide technology with ABC (Automatic Background Calibration)
•High and low threshold setting
•Alarm output drive relay to control system
•Backlight function
•Recall MAX and MIN reading
•Long time drift compensation
•Comes with power adaptor (choose one from the available plug US/UK/AU/EUR)