1. Introduction
The EE181 is a rugged, accurate temperature and relative humidity probe that is ideal for long-
term, unattended applications in all climates. The probe uses an E+E Elektronik® capacitive RH
element with a proprietary coating to measure relative humidity and a 1000 Ω PRT to measure
temperature. For optimum results, the EE181 should be recalibrated annually.
For Edlog data logger support, contact Campbell Scientific.
2. Precautions
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READ AND UNDERSTAND the
section at the back of this manual.
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Care should be taken when opening the shipping package to not damage or cut the cable
jacket. If damage to the cable is suspected, contact Campbell Scientific.
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Although the EE181 is rugged, it should be handled as a precision scientific instrument.
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Do not touch the sensor element.
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Santoprene® rubber, which composes the black outer jacket of the cable, will support
combustion in air. It is used because of its resistance to temperature extremes, moisture,
and UV degradation. It is rated as slow burning when tested according to U.L. 94 H.B. and
passes FMVSS302. However, local fire codes may preclude its use inside buildings.
3. Initial inspection
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Upon receipt of the EE181, inspect the packaging and contents for damage. File damage
claims with the shipping company.
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The model number and cable length are printed on a label at the connection end of the
cable. Check this information against the shipping documents to ensure the expected
product and cable length were received.
EE181 Temperature and Relative Humidity Probe
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