Specifications

Compatibility:	Fully SDI-12 V1.3-compliant digital output (verified with an SDI-12 Verifier (www.sdi-12-verifier.com ). Compatible with SDI-12 V1.4 recorders including Campbell Scientific CR6, CR3000, CR1000X, CR800-series, CR300-series, and CR1000 data loggers.
Sensor element:	Sensirion SHT35 derivative
Calibration traceability:	NIST and NPL standards. See Sensor element calibration for details of calibration traceability.
Supply voltage:	7 to 28 VDC
Current consumption:	50 µA quiescent, typical 0.6 mA during 0.5 s measurement typical
Warm-up time:	Sensor normally powered all the time; if power is switched, allow 1.8 s for sensor power-up.
Diameter:	12.5 mm (0.49 in) at sensor tip; maximum 16 mm (0.63 in) at the cable end
Length:	115 mm (4.52 in), sensor only, without cable
Housing material:	White PET-P
Housing classification:	IP67 (electronics housing)
Sensor protection:	Outer glass-filled polypropylene cap fitted with a stainless steel mesh dust filter with nominal pore size of <30 µm. The sensor element is fitted with a PTFE protective film with a filtration efficiency of >99.99% for particles of 200 nm or larger size.
EMC compliance:	Tested and conforms to IEC61326:2013
Calibration:	The sensor element is individually calibrated during manufacture.
Compliance documents:	View at www.campbellsci.com/hygrovue5

Temperature measurement

Operating range:	–40 to 70 °C
*Accuracy:**	±0.4 °C (–40 to 70 °C) ±0.3 °C (20 to 60 °C)
Long term drift:	<±0.03 °C/year
Reported resolution:	0.001 °C
Repeatability:**	0.04 °C
Response time:	130 s (63% response time in air moving at 1 m/s)
Units:	Degrees Celsius
The accuracy figures quoted are relative to factory standards. *Values are 3 standard deviations of 25 measurements at constant temperature.

Operating range:	0 to 100% RH
*Accuracy (at 25 °C):**	±1.8% (0 to 80% RH) ±3% (80 to 100% RH)
Temperature dependence:	< ±1% RH (–40 to 60 °C)
Short term hysteresis:	< ±1% RH
Long-term stability:	±0.5% per year (drift in clean air conditions)
Reported resolution:	0.001% RH
Repeatability:**	0.05% RH
Response time with filter:	8 s (63% response time in air moving at 1 m/s @ 25 °C)
Environmental performance:	See Environmental performance
The accuracy figures quoted are relative to factory standards. *Values are 3 standard deviations of 25 measurements at constant humidity.