ACR Electronics SmartReader Plus Reference Manual page 79

Range:
Accuracy:
Resolution:
Environmental Conditions:
Chemical Tolerances:
External Sensors(2):
Range:
Specifications are subject to change without notice.
Copyright © 2010 ACR Systems Inc. All Rights Reserved.
SmartReader Plus Data Logger
0 to 95% RH
±3% RH from 10 to 90% (-20 to 40°C [-4 to 104°F])
Better than 0.04% RH between 25 and 60% RH at 25°C
(77°F)
The RH sensor is relatively immune to chemical
contamination but when exposed to extreme environmental
conditions, accuracy degradation could result. For long-term
stability and reliable readings, the sensor should not be
subjected to liquid immersion or exposed to high
concentrations of organic solvents, corrosive agents, sulfur
gases and strong acids or bases. Dust settling on the sensor
surface will not affect sensor performance except possibly to
decrease the speed of response.
Limits for different chemical groups
1. Organic solvents typically 1,000...10,000 ppm
2. Corrosive agents (strong acids S02, H2SO4, Cl2, HCl,
H2S etc.) typically 1...10 ppm
3. Weak acids typically 100...1,000 ppm
4. Bases typically 10,000...100,000 ppm
Any two sensors with a 0-5 VDC output
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