FEATURES
• Suitable for outdoor use.
• Stable at 100% humidity.
• Analog humidity and temperature output, in 3 user-selectable
ranges for compatibility with most data loggers:
- 0 ~ 1V
- 0 ~ 2.5V
- 0 ~ 5V
• Digital SDI-12 humidity and temperature output
- Provides instantaneous values.
- Provides the average values for the interval between readings.
- Responds to a subset of SDI-12 commands: aM!, aM1!, aI!, ?!, aAb!

PROBE SPECIFICATIONS

Humidity
• Measurement principle: Capacitive sensor
• Temperature operation span: - 40 ~ +90 C
• Humidity operation span: 0 ... 100 % RH(max. Dew Point: 80 C)
• Humidity accuracy:
- Typical: < ±1,5 % RH - Maximum: see Figure 1 • Repeatability: ±0.2 %RH typical • Hysteresis: < ±0.8 %RH • Resolution: 0.01% • Response time: < 12 seconds • Long term drift: < 0.25%RH /year

Temperature
• Sensor temperature span: -45 ~ +130 C
• Temperature accuracy:
- Typical: +1 0,1C (20 ~ 50 C)
- Maximum see Figure 2
• Resolution: 0.01°C
• Response time: < 5 seconds • Long term drift: < 0.03C /year

General
• Analog humidity and temperature output, in user-selectable ranges: 0 ~ 1V, 0 ~ 2.5V, 0 ~ 5V.
• SDI-12, v1.3 compatible.
• Sampling rate: 2 seconds.
• Operation voltage: 8...30 Volts DC
• Operating Temperature: - 40 ~ +80 C
• Current consumption: < 3 mA • Cable length: 3 meters • Dimensions: Height=160 mm, Diameter=16 mm • Certification: CE • Made in E.U. under ISO9001 • Optional: MODBUS interface

SHIELD SPECIFICATIONS
• Material: UV stabilized white thermoplastic plates
• Temperature error @ 1000 W/m2 radiation intensity:
• 0.7°C RMS @ 2 m/s wind speed
• 1.5°C RMS @ 1 m/s wind speed
• Dimensions: Height=210 mm, Diameter=130 mm

ORDERING INFO
Model: HT-500
Part Number: PR.001.0023