EE181
EE181
OrderableConfigurableAir Temperature and Relative Humidity Sensor
Best for high-humidity environments.
Pricing
- Model:
- EE181
- Item Number:
- 44235
- Warranty:
- 1 year
- Lead time:
- 14 days
Overview
The EE181 is a rugged, accurate air temperature and relative humidity (RH) probe that is ideal for long-term, unattended applications. It includes a proprietary coating on the RH element that increases the life of the element and protects it from dirt, dust, salt, or other contaminants. A 1000 Ω PRT measures air temperature for the -40° to +60°C range. For optimum results, the EE181 should be recalibrated annually.
This featured product was part of the Aconcagua expedition to install a weather station on South America’s tallest peak. Learn more about the expedition on our Extreme Application Series: Aconcagua page.
Key Advantages
Ideal for long-term, unattended applications
Benefits
- Well-suited for long-term, unattended applications
- Accurate, rugged, reliable
- Outstanding long-term stability
- Wide operating temperature range
- User cleanable
- Compact and easily interchangeable
- Low power consumption
- Compatible with most Campbell Scientific dataloggers
Specifications
- Measurement Description
- Temperature, relative humidity
- Signal Type/Output
- Analog voltage
- Supply Voltage
- 7 to 30 Vdc
(typically powered by the datalogger’s 12 V supply)
- Average Current Consumption
- < 1.2 mA
- Filter Description
- 30 μm pore size, stainless-steel mesh
- Startup Time
- 2 s
- Housing Body Material
- Plastic
- Housing Classification
- IP65
- Field Replaceable Chip or Recalibrate
- Recalibrate
- Operating Temperature Range
- -40° to +60°C
- Sensor Diameter
- 2.1 cm
(0.83 in.)
- Length
- 16.0 cm
(6.3 in.)
- Weight
- 290 g
(10.2 oz) with 5 m cable
Air Temperature
- Sensing Element
- 1000 Ω Platinum Resistance Thermometer (PRT)
- Measurement Range
- -40° to +60°C
- Storage Temperature Range
- -40° to +80°C
- Output Signal Range
- 0 to 1 Vdc
- Accuracy
- ±0.2°C
(at +23°C)
Relative Humidity
- Sensing Element
- Capacitance
- Measurement Range
- 0 to 100% RH
(non-condensing)
- Output Signal Range
- 0 to 1 Vdc
- Temperature Dependence
- Typically 0.03% RH/°C
- Accuracy
- -NOTE- Accuracy specifications include hysteresis, non-linearity, and repeatability.
- Accuracy
- ±(1.3 + 0.003 • RH reading) % RH
(at -15° to +40°C, 0 to 90% RH)
- Accuracy
- ± 2.3% RH
(at -15° to +40°C, 90 to 100% RH)
- Accuracy
- ± (1.4 + 0.01 • RH reading) % RH
(at -25° to +60°C)
- Accuracy
- ± (1.5 + 0.015 • RH reading) % RH
(at -40° to +60°C)
Related Resources
Case Studies
Rwanda: Weather Station Upgrades with GBON-Compliant Instrumentation
Improving observational data to benefit global numerical weather prediction systems
Rwanda, Africa
June 18, 2025
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Utah: Flux Stations
Improving ground-truth measurement of water throughout the state
Utah, USA
June 9, 2023
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Union of the Comoros: Establishment of Four Weather Stations for Better Resilience to Climatic Hazards
Monitoring an area prone to seasonal cyclones
The Union of the Comoros, East Africa
January 14, 2022
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Documents
Campbell Scientific offers new EE181 temperature and humidity probe
View Document- Manual
EE181 Temperature and Relative Humidity Probe
January 2025
View Document - Brochure
EE181 Air Temperature and Relative Humidity Probe
March 2026
View Document - Compliance
EE181 RoHS Declaration of Conformity
January 2021
View Document - View all documents