With a built-in display and data logger, the ACR-205 provides the user with a reliable and accurate method of evaluating indoor air quality by measuring and recording temperature, relative humidity, carbon dioxide, and one or two other gases at the same time. These other gases can include: carbon monoxide (CO), nitrogen dioxide (NO2), oxygen (O2), ammonia (NH3), chlorine (Cl2), chlorine dioxide (ClO2), fluorine (F2), hydrogen (H), hydrogen chloride (HCl), hydrogen cyanide (HCN), hydrogen sulphide (H2S), nitric oxide (NO), ozone (O3), or sulphur dioxide (SO2).

Specifications

Size:	214 mm x 152 mm x 55 mm (8.44" x 6.0" x 2.18")
Weight:	1.32 Kg (2.91 lb)
Case Material:	Powder painted aluminum
Mounting:	Handheld, desk or wall mount
Operating Limits:	0 to 50°C (32 to 122°F) and 0 to 100% RH (non-condensing)
Clock Accuracy:	+/- 2 seconds per day
Battery (in logger):	3.6 volt Lithium
Battery (in monitor):	Integral sealed lead acid
Memory Size:	128 KB (87,000 readings)
Sampling Methods:	1. Continuous (First-in, First-out) 2. Stop when full (Fill-then-stop)
Sampling Rates:	From 8 seconds to once every 8 hours
Resolution:	12-bit (1 part in 4096)
PC Requirements:	IBM PC or 100% compatible with at least 2 MB RAM, 2 MB of hard drive disk space and one free serial port
Software Requirements:	TrendReader® Standard - compatible with Windows 3.1, 95, 98, 2000, Me, NT and XP
Temperature Sensor Specifications
Type	NTC Thermistor
Range	0 to 50°C (32 to 122°F)
Accuracy	+/- 0.5°C @ 25°C (+/- 0.9°F @ 77 °F)
Relative Humidity Sensor Specifications
Type	Thin film capacitance
Range	0 to 100% RH
CO2 Sensor Specifications
Type	NDIR
Range	0 to 5,000 ppm (standard)
Accuracy	+/- 20 ppm (typical)
CO Sensor Specifications
Type	Electrochemical
Range	0 to 50 ppm
Accuracy	< 2% per month in clean air
NO2 Sensor Specifications
Type	Electrochemical
Range	0 to 5 ppm
Accuracy	< 3% @ 3 months
Other Gas Sensors
Other Gas Sensors	O2 (0 - 25.0% Volume, 0.2% Volume) NH3 (0 - 100 ppm, 1 ppm) Cl2 (0 - 5.0 ppm, 0.02 ppm) ClO2 (0 - 1.0 ppm, 0.02 ppm) F2 (0 - 1.0 ppm, 0.02 ppm) H2 (0 - 4000 ppm, <20 ppm) HCl (0 - 30 ppm, 0.5 ppm) HCN (0 - 30 ppm, 0.3 ppm) H2S (0 - 50 ppm, 0.05 ppm) NO (0 - 100 ppm, 0.1 ppm) O3 (0 - 1.00 ppm, 0.02 ppm) SO3 (0 - 20 ppm, 0.1 ppm

Ordering Information

Model	Type	Catalog #
ACR-205	Temperature, RH, CO2 and 2 spare channels	01-0337
ACR-205-4	Temperature, RH, CO2, CO and 1 spare channel	01-0332
ACR-205-5	Temperature, RH, CO2, CO and NO2	01-0333