The Smart-Reader2 data logger has a bulit-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 continous recording. The SmartReader2 is excellent for monitoring "air-quality" conditions.

Nor. of Channels: Four

• - One for abient temperature
• - One for relative humidity (internal sensor)
• - One for relative humidity (external sensor)
• - One for temperature, resistance or switch status

• Relative Humidity Sensor: Capacitive thin polymer film
• Range: 0 to 95% RH (non-condensing)
• Accuracy: + / - 4% RH from 10 to 90% RH (-20 to 40ºC [-20 to 104ºF])
• Resolution: Better than 0.4% between 25 and 60% RH at 25ºC (77ºF)
• Response Time: Adequate ventilation increases the responce tim which is approximately 5 minutes in still air
• Memory Size: 32 KB
• Enviromental Conditions: Like all relative humidity sensors, wehn exposed to containments and /or extreme enviromental conditions, accuracy degradation could result. For maximum lonterm stability, sensor should not be exposed or subjected to organic solvents, corrosive agents (strong aids, SO2, H2SO4, CI2, HCI, H2S etc.) and strong bases (compounds with PH greater than 7). Dust settling on the sensor surface will not affect sensor performance expect possibly to decrease the speed of response.
• Accessories: ACR EH-020A Temperature & RH Probe, ACR ET Series Temperature Probe or any NTC thermistor probe