Read HC2S3 Temperature and RH Sensor Brochure text version



Temperature and RH Sensor

The HC2S3 is a rugged, accurate temperature/RH probe that is ideal for long-term, unattended applications. The probe uses a Rotronic's IN1 capacitive sensor to measure RH and a 100 ohm PRT to measure temperature. For optimum results, the HC2S3 should be recalibrated annually. The HC2S3 comes with a polyethylene filter that protects its sensor from fine dust and particles and minimizes water absorption and retention. Alternatively, a teflon filter is available for marine environments. The response time is slower when using the teflon filter.


Sensor Mounts

The 41003-5 radiation shield should be used when the HC2S3 is exposed to sunlight. The 41003-5 can attach directly to a mast or tower leg or to a CM202, CM204, or CM206 crossarm.



Ordering Information

Air Temperature and Relative Humidity Probe

HC2S3-L Rotronics Temperature/RH Probe with user-specified cable length. Enter cable length, in feet, after the -L. Maximum cable length is 1000 ft (300 m) with 12 V power, or 10 ft (3 m) with 5 V power. Must choose a cable termination option (see below).

Cable Termination Options (choose one)

-PT -PW -CWS Cable terminates in stripped and tinned leads for direct connection to a datalogger's terminals. Cable terminates in connector for attachment to a prewired enclosure. Cable terminates in a connector for attachment to a CWS900series interface. Connection to a CWS900-series interface allows this sensor to be used in a wireless sensor network. Cable terminates in a connector for attachment to a CS110 Electric Field Meter or ET107 weather station. Cable terminates in a connector for attachment to a RAWS-P Permanent Remote Automated Weather Station.

41003-5 Tripod or Tower Mast

-C -RQ


Common Accessories

41003-5 27755 10-Plate Gill Radiation Shield to house the HC2S3 Teflon Filter for marine environments.

Recommended Cable Lengths

2-m Height

Mast/Leg 9 ft CM202 11 ft CM6 11 ft

Atop a tripod or tower via a 2-ft crossarm such as the CM202

CM106 14 ft CM10 14 ft CM110 14 ft CM115 19 ft CM120 24 ft UT10 14 ft UT20 24 ft UT30 37 ft

Note: Add two feet to the cable length if mounting the enclosure to the leg base of a CM106, CM110, CM115, or CM120 tripod.


Electronics Operating Limits: -40° to +100°C -50° to +100°C 15 mm (0.6 in.) 85 mm (3.3 in.) 183 mm (7.25 in.) 10 g (0.35 oz) Accuracy °C Polyethylene Teflon (ordered separately; see Ordering Information) <4.3 mA @ 5 Vdc <2.0 mA @ 12 Vdc 5 to 24 Vdc 1.5 s typical1 <50 mA for 2 µs +0.6 +0.4 +0.2 0 -0.2 -0. 4 -0.6 -0.8 -1.0 -40 -20 0 20 40 60 80 100 Temperature °C Storage Temperature: Dimensions Diameter: Length w/o connector: Length w/connector: Weight: Filter Standard: Optional: Current Consumption: Supply Voltage: Startup Time: Maximum Startup Current:

Temperature Accuracy Graph

Analog Outputs Offset at 0 V: ±3 mV (maximum) Deviation for Digital Signal: < ±1 mV (0.1°C, 0.1% R. H.)


Temperature Sensor: Measurement Range: Output Signal Range: Accuracy at 23°C: Long Term Stability:

PT100 RTD, IEC 751 1/3 Class B -50° to +100°C (default to -40° to +60°C) 0 to 1 V ±0.1°C with standard configuration settings <0.1°C/year 100 90 80 70 ±3.3 % RH ±2.3 % RH ±0.8 % RH ±1.3 % RH ±1.8 % RH 60 ±1.3 % RH ±2.8 % RH 80 100

Copyright © 2011, 2012 Printed June 2012

RH Accuracy Graph

Sensor Time Constant [63% step change (1 m/s air flow at sensor)] Standard PE Filter: 22 s Optional Teflon Filter: 30 s Temperature Accuracy: see graph at top right ROTRONIC Hygromer IN-1 0 to 100% RH, non-condensing 0 to 1 Vdc ±0.8% RH with standard configuration settings <1% RH per year % RH

60 50 40 30 20 10 0

Relative Humidity (RH)

Sensor: Measurement Range: Output Signal Range: Accuracy at 23°C: Long-Term Stability:

Sensor Time Constant [63% of a 35 to 80% RH step change (1 m/s air flow at sensor)] Standard PE Filter: 22 s Optional Teflon Filter: 30 s RH Accuracy over Temperature: see graph at bottom right






Temperature °C

Notes: 1 The startup time is Rotronics specification. Campbell Scientific recommends 2 s at 60°C, 3 s at 0°C, and 4 s at -40°C. 1 The black outer jacket of the cable is Santoprene® rubber. This compound was chosen for its resistance to temperature extremes, moisture, and UV degradation. However, this jacket will support combustion in air. It is rated as slow burning when tested according to U.L. 94 H.B. and will pass FMVSS302. Local fire codes may preclude its use inside buildings.

Campbell Scienti c, Inc. | 815 W 1800 N | Logan, UT 84321-1784 | (435) 227-9000 |



HC2S3 Temperature and RH Sensor Brochure

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HC2S3 Temperature and RH Sensor Brochure