Sato SK-RHC Series Temperature and Humidity Transmitters

The Sato SK-RHC Series measures temperature and humidity with a local display and output for compatible monitoring equipment.

  • Voltage, 4–20 mA or RS-485 versions selected when ordering.
  • Plug-in, remote and miniature flexible probe options.
  • Relay alarm with an upper or lower threshold for each parameter.
  • Selectable 1-second or 10-second refresh interval.
  • Probe purchased separately; measurement range and accuracy depend on the probe.

Sato SK-RHC Series Temperature and Humidity Transmitters

The Sato SK-RHC Series combines a local temperature and humidity display with an output for a compatible recorder, indicator or monitoring system. Choose the transmitter output and a suitable SK-RHCS probe to match the measurement location and receiving instrument.

Key Features

  • Temperature and relative humidity measurement with a local display.
  • Voltage, 4–20 mA or RS-485 versions selected when ordering.
  • Three probe designs: plug-in, remote sensor and miniature flexible sensor.
  • Relay alarm output with an upper or lower threshold for each parameter.
  • Selectable 1-second or 10-second refresh interval.

The probe is purchased separately. An optional AC adapter is also available.

Sato SK-RHC temperature and humidity transmitter

Sato SK-RHC transmitter product view

Choose the Transmitter Output

These are separate ordering versions; one unit does not provide every output option.

ModelCatalogue numberOutput version
SK-RHC-V 8920-01 Voltage: 0–1 V humidity output
SK-RHC-V 8920-02 Voltage: 0–100 mV humidity output
SK-RHC-I 8920-03 Current: 4–20 mA
SK-RHC-C 8920-04 Digital: RS-485

Signal Scaling and Connection

VersionTemperature signalHumidity signal
8920-01 −10 to 60°C = −100 to 600 mV 0 to 100% RH = 0 to 1,000 mV
8920-02 −10 to 60°C = −10 to 60 mV 0 to 100% RH = 0 to 100 mV
8920-03 −15 to 65°C = 4 to 20 mA 0 to 100% RH = 4 to 20 mA
8920-04 RS-485 serial communication 9,600 bps; 8 data bits; 1 stop bit; no parity

Signal scaling does not extend the connected probe’s measuring range. For the voltage versions, temperature and humidity use different scaling. Confirm the receiving device’s input range and wiring before connection. For RS-485 integration, check the communication protocol as well as the electrical interface.

Specified output accuracy is ±0.3°C / ±0.3% RH for the voltage versions and ±1.0°C / ±1.0% RH for the current version. These are output-stage specifications; probe measurement accuracy is listed separately below.

Main Unit Specifications

SpecificationDetails
Measurement range and accuracy Depend on the connected SK-RHCS probe
Power supply 12–14 VDC, or an optional AC adapter; confirm the rating on the supplied unit before wiring
Operating environment −10 to 60°C; below 80% RH, without condensation
Refresh interval 1 or 10 seconds, manually selectable
Alarm function Relay contact; one upper OR lower threshold can be set for temperature and for humidity
Dimensions 118 W × 100 H × 42 D mm
Weight Approximately 220 g
Materials ABS resin body and acrylic display window

Compatible Temperature and Humidity Probes

All three probes use a thermistor for temperature and a polymeric resistive humidity sensor. Select the probe layout and accuracy that suit your measurement task.

SK-RHCS-1 Plug-in Probe

SpecificationSK-RHCS-1

Sato SK-RHCS-1 Plug-in Probe
Catalogue number 8921-00
Temperature range −10 to 60°C
Humidity range 20 to 95% RH at 23°C
Temperature accuracy ±0.5°C at 20 to 30°C; ±1.0°C elsewhere within the measuring range
Humidity accuracy ±3% RH at 30 to 90% RH and 20 to 30°C
Dimensions 29 W × 121 H × 24 D mm, excluding protrusions
Weight Approximately 42 g

SK-RHCS-2 Remote Sensor Probe

SpecificationSK-RHCS-2

Sato SK-RHCS-2 Remote Sensor Probe
Catalogue number 8922-00
Temperature range −10 to 60°C
Humidity range 20 to 95% RH at 23°C
Temperature accuracy ±0.5°C at 20 to 30°C; ±1.0°C elsewhere within the measuring range
Humidity accuracy ±3% RH at 30 to 90% RH and 20 to 30°C
Sensor dimensions 19 mm diameter × 118.5 mm length
Cable length 5 m; ask about manufacturer-supported extensions if required
Weight Approximately 228 g

SK-RHCS-3 Miniature Flexible Probe

SpecificationSK-RHCS-3

Sato SK-RHCS-3 Miniature Flexible Probe
Catalogue number 8922-10
Temperature range −10 to 60°C
Humidity range 20 to 95% RH at 23°C
Temperature accuracy ±0.7°C at 20 to 30°C; ±1.2°C elsewhere within the measuring range
Humidity accuracy ±4% RH at 30 to 90% RH and 20 to 30°C
Sensor dimensions 6 mm diameter × 35 mm length
Cable length 1.5 m
Weight Approximately 87 g

Ordering and Installation Notes

  • Specify the complete configuration: transmitter catalogue number, probe model and required power arrangement.
  • Match the receiving equipment: check input type, scaling, grounding and isolation requirements, particularly for current-output wiring.
  • Check the measurement conditions: humidity accuracy applies only within the stated temperature and humidity conditions.
  • Arrange calibration documents: request the required calibration points and certificate when ordering. Calibration options depend on the probe and main-unit combination.

The earlier Seacom listing references AC adapter 7687-52. For an existing installation, provide the transmitter and adapter labels so we can confirm the appropriate supply option.

Related Temperature and Humidity Instruments

Need Help Selecting an SK-RHC Transmitter?

Contact Seacom Process Instruments Sdn Bhd with your temperature and humidity range, required output, probe location and receiving instrument model. For a replacement, include a photograph of the existing transmitter and probe labels.

Download

  SK-RHC Catalogue   (151.96k)


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