Carbon Dioxide & Temperature Meter GCH-2018

Circuit	Custom one-chip of microprocessor LSI circuit.
Display	LCD size: 52 mm x 38 mm dual function LCD display.
Measurement	CO2 (Carbon dioxide), Temp. Humidity, Dew point, Temp.
Unit	CO2	ppm
	Humidity	% RH
	Dew point	℃℉
	Temp.	℃℉
Response Time	CO2 : < 2 min. typically. @ Reach the 63% reading value @ Depend the environment air circulation.
	Humidity/Dew point: 10 to 30 seconds typically. @ Reach the 85% reading value
Temperature Compensation	Automatic temp. compensation.
Advanced setting	CO2 altitude value setting
	CO2 alarm value setting
	℃℉ Setting
	Auto power off enable/disable setting
Alarm setting	For CO2 measurement only.
Data Hold	Freeze the display reading.
Memory Recall	Maximum & Minimum value.
Display Sampling Time	Approx. 1 second.
Power off	Auto shut off saves battery life or manual off by push button.
Data Output	RS 232 PC serial interface.
Probes no.	Two probes: · Probe 1 is for CO2, Temp. measurement. · Probe 2 is for Humidity, Dew point. Temp. measurement.
Operating Temperature	Temperature
Operating Humidity	Main instrument: Less than 85% R.H.
	C02 probe: Less than 85% R.H.
	Humidity probe: 0 to 95 %RH.
Power Supply	DC 1.5 V battery (UM4, AAA) x 6 PCs, or equivalent.
Power Current	CO2 measurement Approx. DC 9.6 mA for 90% period. Approx. DC 128 mA for 10% period.
	Humidity measurement Approx. DC 5.6 mA.
Weight	Main instrument: 312 g/0.68 LB. @ Battery is included.
	CO2 probe: 158 g/0.35 LB.
	Humidity probe: 82 g/0.18 LB.
Dimension	Main instrument: 173 x 68 x 42 mm (7.9 x 2.7x 1.2 inch)
	CO2 Probe: 185 x 38 x 26 mm
	Humidity Sensor Probe: 200 x 23 x 19 mm
Accessories Included	Instruction manual…………………..1 PC CO2 probe………………………………..1 PC Humidity probe………………………..1 PC Hard Carrying case……………………1 PC
Optional Accessories	RS232 cable, UPCB-02 USB cable, USB-01 Data Acquisition software, SW-U801-WIN

NDIR method principal for CO2 (Carbon dioxide) measurement, available for long term operation.
High repeatability and high accuracy.
Two probes, one is for CO2/Temp. measurement, the other probe is for Humidity/Temp./Dew point measurement.
Separate probe, easy operation and convenient for remote measurement.
CO2 function with alarm setting.
Humidity measurement with fast response time.
Large S-TN LCD, high contrast, easy readout.
Data hold function for freezing the desired value on display.
Records Maximum and Minimum readings with Recall.
RS232 computer interface.
Microprocessor circuit assures maximum possible accuracy, provides special functions and features.
Heavy duty & compact housing with hard carrying case, designed for easy carry out & operation.
Auto shut off is available to save battery life.
Power supply from batteries or DC 9V adapter in.