The SmartReader 2 data logger has a built-in temperature sensor, a plug-in relative humidity sensor and is equipped with two extra channels to connect either ACR's temperature/RH probe or thermistor probes. The RH plug-in sensor is field replaceable so you can always be assured of continuous recording. The SmartReader 2 is excellent for monitoring air quality conditions.

Specifications

Range	0 to 95% (non-condensing)
Resolution	Better than 0.4% between 25 & 60% RH at 25° C (77° F)
Accuracy	+/- 4% RH from 10 to 90% (-20 to 40°C [-4 to 104°F])
Memory Size	32 KB
Accessories	ACR EH-020A Temperature & RH Probe ACR ET Series Temperature Probes
No. of Channels	Four (one for internal temperature sensor, one for internal RH sensor, one for optional external RH, and one for optional external temperature or resistance)
RH Sensor	Capacitive thin polymer film
Response Time	Adequate ventilation increases the response time which is approximately 5 minutes in still air
Environmental Conditions	Like all relative humidity sensors, when exposed to contaminants and/or extreme environmental conditions, accuracy degradation could result. For maximum long-term stability, sensor should not be exposed or subjected to organic solvents, corrosive agents (strong acids, SO2, H2SO4, CI2, HCl, H2S, etc.), and strong bases (compounds with PH greater than 7). Dust settling on the sensor surface will not affect sensor performance except possibly to decrease the speed of response.

Ordering Information

Model	Memory	Catalog #
SR-002	32 KB	01-0025