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SK-RHC Catalogue
Temperature Transmitter SK-RHC
151.96KB
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.
Choose the Transmitter Output
These are separate ordering versions; one unit does not provide every output option.
| Model | Catalogue number | Output 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
| Version | Temperature signal | Humidity 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
| Specification | Details |
|---|---|
| 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
| Specification | SK-RHCS-1 |
|---|---|
|
|
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| 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
| Specification | SK-RHCS-2 |
|---|---|
|
|
|
| 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
| Specification | SK-RHCS-3 |
|---|---|
|
|
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| 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
- Humidity and temperature transmitters for comparison with other fixed measurement options.
- Humidity meters and data loggers for spot checks or recording readings over time.
- Sato measuring 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.
16 other products in the same category:
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- Humidity accuracy up to ±0.8% RH
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- −70 to +180 °C probe-head measurement range
- Standalone Modbus RTU or Vaisala Indigo transmitter operation
The Vaisala HMP9 combines a miniature 5 mm probe head with fast-response, high-accuracy humidity and temperature measurement for tight spaces and rapidly changing environments.
- Humidity accuracy up to ±0.8% RH
- Temperature accuracy up to ±0.1 °C
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- Standalone Modbus RTU or Vaisala Indigo transmitter operation
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- Wall-mounted display for convenient temperature reading.
- S6 with IP43 protection; S6-WP with IP65 protection.
- Liquid-filled and gas-filled configurations.
- Indication-only or optional one or two pointer contacts.
- Optional maximum-temperature pointer.
The Vaisala GMW90 Series provides stable wall-mounted carbon-dioxide and temperature measurement, with optional humidity, for demanding HVAC and building-automation applications.
- Carbon-dioxide measurement from 0 to 5000 ppm
- CO₂ accuracy up to ±(30 ppm + 2% of reading)
- Temperature measurement from −5 to +55 °C
- Optional HUMICAP® relative-humidity measurement from 0 to 95 %RH
- Voltage, current or Modbus RTU output models
- Display and CO₂ status-indicator options
- Field-exchangeable calibrated measurement modules
- Traceable three-point CO₂ calibration certificate included
The Vaisala Origo10 Series comprises modular HVAC transmitters with interchangeable probes for humidity, temperature, CO2 and dew-point measurement.
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The Vaisala HMP155 provides stable humidity and temperature measurement for automatic weather stations, road-weather systems, airports, research sites and demanding outdoor monitoring.
- Relative-humidity measurement from 0 to 100 %RH
- Operating range from −80 to +60 °C
- HMP155A with two analogue voltage outputs
- HMP155D with RH voltage output and passive four-wire Pt100 temperature
- HMP155E with RS-485 digital output
- Optional warmed probe, chemical purge and additional temperature sensor
The Vaisala Indigo200 Series is the standard transmitter platform for one interchangeable Indigo-compatible smart probe, providing local display and practical automation-system connectivity.
- Indigo201 with three analog outputs and two relays
- Indigo202 with Modbus RTU and two relays
- Colour display with numerical and graphical views
- IP65 enclosure for industrial measurement applications
The Vaisala Indigo520 Supervisor manages up to 100 compatible compact humidity and temperature probes through one host unit. It provides local visibility for the maintenance team and Modbus TCP communication for data centre BMS integration.
- Two daisy chains: Up to 50 probes per chain.
- 5-inch touchscreen: View measurements, probe status and alerts.
- Web interface: Supports commissioning and configuration.
- Malaysia project support: Contact Seacom for probe selection and installation requirements.
Expected availability: early 2027. Enquire with Seacom for configuration and delivery confirmation.
The Hyoda M Series provides remote temperature indication through a sensing bulb and capillary tube.
- M3, M4 and M6 models with 75, 100 and 150 mm dials.
- Liquid-filled and gas-filled configurations.
- IP43 standard models and IP65 WP versions.
- Indication-only or pointer-contact configurations.
Vaisala DL1000, DL1400, DL1016 and DL1416 temperature data loggers provide reliable, traceable monitoring for refrigerators, freezers, cold rooms, incubators and regulated facilities.
- Scheduled for future discontinuation; confirm availability before specifying
- Current replacement platform: Vaisala VDL200 with suitable smart probes
- Two- or four-channel configurations
- External probe range down to −90 °C
- Onboard memory and a typical 10-year battery life
The Vaisala XMP10 Series comprises compact humidity and temperature probes offering accuracy levels up to ±1% RH and ±0.1 °C for demanding HVAC, data-centre and critical-environment applications.
The probes feature analog or Modbus RTU outputs, a standard M8 connector, an IP65-rated body and compatibility with Vaisala Origo10 modular HVAC transmitters.
The Vaisala HMP110 is a high-accuracy humidity and temperature probe designed for demanding equipment integration, environmental chambers, data loggers, incubators and controlled-environment applications.
It provides ±1.5% RH accuracy, a 0–100% RH range, −40 °C to +80 °C temperature measurement, a chemically resistant HUMICAP 180R sensor and analog or Modbus RTU output options.
The Vaisala HMP7 is designed for continuously humid, rapidly changing and near-condensing environments. Probe heating helps prevent condensation while maintaining reliable process measurement.
- Humidity accuracy up to ±0.8% RH
- Probe heating for condensation prevention
- −70 to +180 °C probe-head measurement range
- Standalone Modbus RTU or Vaisala Indigo transmitter operation
The EDL DBB Series combines hot and cold black body targets for checking compatible infrared thermometers and pyrometers.
- DBB-350: Cold side −30 to 110°C; hot side ambient to 350°C.
- DBB-650: Cold side −30 to 110°C; hot side ambient to 650°C.
- 50.8 mm (2-inch) diameter targets.
- Provision for external reference sensors, sold separately.
- RS-232 interface and iTools software.
- 120 V and 240 V power versions available.
The Vaisala HMT330 Series was a flagship industrial transmitter platform for humidity, temperature and calculated moisture parameters. It is discontinued and replaced by an Indigo500 transmitter with the HMP probe selected for the application.
- HMT331 wall mounting → HMP1 with Indigo500
- HMT333 ducts and tight spaces → HMP3 or HMP9 with Indigo500
- HMT334 high pressure and vacuum → HMP4 with Indigo500
- HMT335 high temperature → HMP5 with Indigo500
- HMT337 high humidity → HMP7 with Indigo500
- HMT338 pressurised pipelines → HMP8 with Indigo500
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