Hyoda (Japan) Explosion Proof Thermometer with MicroSwitch ES-UT Hyoda (Japan) Explosion Proof Thermometer with MicroSwitch ES-UT
Hyoda (Japan) Explosion Proof Thermometer with MicroSwitch ES-UT

Hyoda ES-UT Explosion-Proof Thermometer with Microswitch

The Hyoda ES-UT is a liquid-filled temperature instrument with a remote sensing bulb and microswitch contacts.

  • One or two microswitch contacts.
  • Available temperature scales within −70 to 400°C.
  • Wall-mounted enclosure with IP65 protection.
  • Published explosion-proof designation: d2G4.
  • Confirm approval suitability for the installation.

Hyoda ES-UT Explosion-Proof Thermometer with Microswitch

The Hyoda ES-UT is a liquid-filled temperature instrument with one or two microswitch contacts for temperature switching. Its wall-mounted enclosure connects to a remote sensing bulb through a capillary system, allowing the instrument to be positioned separately from the measurement point.

Hyoda lists the ES-UT with the explosion-proof designation d2G4 and IP65 enclosure protection. Select the temperature scale, sensing bulb, connection and switching configuration for the application.

ES-UT Specifications

SpecificationDetails
Model ES-UT
Measuring system Organic liquid-filled
Available temperature range coverage −70 to 400°C; select a suitable standard scale
Switching One or two microswitch contacts
Published electrical rating AC 125 V or 250 V / 10 A
Contact adjustment Internal adjustment across the selected full scale
Published capillary length 30 m for the specified liquid-filled arrangement
Mounting Wall-mounted
Enclosure protection IP65
Published explosion-proof designation d2G4

The range coverage does not mean every unit has a −70 to 400°C scale. Confirm the actual scale, bulb dimensions, connection and capillary length when specifying the instrument.

Explosion Protection and Installation Requirements

Confirm the instrument marking, applicable approval documentation and installation requirements against the site's hazardous-area classification. The d2G4 designation should not be presented as an ATEX or IECEx approval without supporting documentation for the supplied instrument.

Explosion protection describes the enclosure's protection concept; it is not a process-pressure rating. Specify the process pressure separately when selecting the sensing bulb, fitting and any thermowell.

Choosing the Right Configuration

  • Temperature: provide the normal operating range, expected extremes and required switching points.
  • Contacts: specify whether one or two switching points are needed, together with the circuit voltage, load type and current.
  • Sensing bulb: confirm insertion length, diameter, process connection and material compatibility.
  • Capillary route: measure the distance between the sensing point and instrument, allowing for a protected installation route.
  • Installation: provide the hazardous-area requirements, ambient conditions and mounting details.
  • Replacement: compare the complete existing specification rather than relying on the model name alone.

Compare All Six Hyoda Thermometer Listings

Product / rangeInstrument typeDisplay / arrangementIndication / switchingProtectionSelection focus
M Series Fluid-filled; M3/M4/M6 and WP versions 75 / 100 / 150 mm; remote bulb Optional pointer contacts; M3: one, M4/M6: one or two IP43; WP: IP65 Remote reading with a choice of dial sizes
S6 / S6-WP Fluid-filled 150 mm; remote bulb Indication only or one/two pointer contacts IP43; WP: IP65 Large dial for remote temperature indication
AY Series Bimetal; AY4/AY5 and QS versions 100 / 125 mm; stem-mounted; QS adjustable head Temperature indication IP65 Local reading at the sensing stem
KME-2 / KME-4 Fluid-filled; wall-mounted KME-2: with indicator; KME-4: without indicator One microswitch contact IP43 Temperature switching with or without local indication
ES-UT Liquid-filled; wall-mounted Remote sensing bulb One or two microswitch contacts IP65; published explosion-proof designation d2G4 Applications requiring a suitable explosion-protected controller; confirm approval suitability
Fluid-Filled Thermometer Range General range listing; multiple configurations Depends on selected model Depends on selected model Depends on selected model Explore other Hyoda temperature indication and control options

The Fluid-Filled Thermometer Range is an overview listing, not a single model with one specification. Compare the exact model, temperature scale, sensing bulb, connection and mounting before ordering. S6 and M6 both have 150 mm dials, but this does not establish interchangeability.

Related Hyoda Thermometers

  • S6 / S6-WP — Fluid-filled thermometer with a 150 mm dial, remote sensing bulb and a choice of IP43 or IP65 enclosure.
  • M Series — Fluid-filled thermometers with 75, 100 or 150 mm dials, remote sensing bulbs and optional pointer contacts.
  • KME-2 / KME-4 — Fluid-filled temperature controllers with one microswitch contact; KME-2 includes an indicator, while KME-4 has no indicator.
  • AY Series — Bimetal thermometers for local indication, with 100 or 125 mm dials and adjustable-head QS versions.
  • Fluid-Filled Thermometer Range — Explore other Hyoda configurations for temperature indication and control, selected according to the measurement and installation requirements.

Need Help Selecting an ES-UT Thermometer?

Contact Seacom with your temperature range, switching requirements, process connection, capillary length and hazardous-area requirements. For a replacement, include photographs of the existing nameplate, approval markings and installation so we can help check the appropriate configuration.


Specific References

12 other products in the same category:

.

Vaisala HMT370EX Intrinsically Safe Transmitter | Seacom

Vaisala HMT370EX & DMP370 Intrinsically Safe Humidity, Temperature and Dew Point Measurement

The Vaisala HMT370EX provides intrinsically safe humidity and temperature measurement with HMP-series probes. The new DMP370 configuration combines the HMT370EX transmitter with a DMP37X DRYCAP® probe for low-dew-point measurement in hazardous locations.

  • HMP probes for relative humidity and temperature
  • DMP370 dew-point measurement from −70 to +10 °C Td/f
  • Two two-wire 4–20 mA outputs
  • Certified configurations for hazardous gas and dust areas, up to Zone 0 / 20
  • Detachable probes and traceable calibration

DMP370 availability: Vaisala plans first deliveries for Q1 2027. Contact Seacom for configuration and project lead time.

Vaisala Indigo510 Indigo520 Malaysia

Vaisala Indigo510 and Indigo520 Flagship Transmitters

The Vaisala Indigo500 Series provides flagship industrial measurement integration: choose Indigo510 for a simplified single-probe system or Indigo520 for full dual-probe capability.

  • Indigo510: one probe and two isolated analog outputs
  • Indigo520: two probes, four isolated outputs and two relays
  • Ethernet web interface and Modbus TCP communication
  • Rugged IP66 and NEMA 4 metal enclosure
Vaisala Immersion Temperature Transmitter TMI110

Vaisala TMI110 Immersion Temperature Transmitter

The Vaisala TMI110 provides high-accuracy temperature measurement for data-centre chilled-water systems, HVAC cooling and heating circuits, and ventilation ducts.

  • ±0.1 °C accuracy at +20 °C
  • Fast response time of less than 8 seconds
  • 4–20 mA or Modbus RTU output options
  • IP65 enclosure with traceable calibration certificate
Vaisala PTU300 Pressure, Humidity and Temperature Transmitter – Discontinued

Vaisala PTU300 Pressure, Humidity and Temperature Transmitter – Discontinued

The Vaisala PTU300 combined barometric pressure, relative humidity and temperature in one transmitter. The series is discontinued and has been replaced by a suitable Indigo520 barometric-pressure configuration with an application-specific HMP probe.

  • Legacy three-in-one pressure, humidity and temperature transmitter
  • PTU301, PTU303, PTU304, PTU305, PTU307 and PTU308 variants
  • Former applications include laboratories, meteorology and semiconductor measurement
  • Current replacement platform: Indigo520 with barometric-pressure measurement
  • Humidity probe selected according to mounting and process conditions
  • Existing wiring, outputs and process connections require migration review
EDL Comparison Cryostat Calibrator CryoCal2

EDL CRYO-CAL-2-LI Comparison Cryostat Calibrator

The EDL CRYO-CAL-2-LI uses liquid nitrogen cooling for comparison calibration of compatible temperature sensors.

  • Temperature range: −196°C to 0°C.
  • Standard calibration block with four sensor wells.
  • Controlled non-inductive DC heater.
  • No pumping or stirring system.
  • RS-232 interface and iTools software.
  • 120 V and 240 V power configurations available.
Vaisala HMT120 and HMT130 Transmitters – Are Being Replaced by Origo10

Vaisala HMT120 and HMT130 Transmitters – Are Being Replaced by Origo10

The Vaisala HMT120 and HMT130 provide accurate, stable humidity and temperature measurement for cleanrooms, laboratories, data centres and demanding HVAC applications.

Product transition: HMT120/HMT130 are expected to be phased out. For new projects, the Vaisala Origo10 is the recommended replacement platform.

  • Humidity accuracy up to ±1.5% RH
  • HMT120 loop-powered 4–20 mA output
  • HMT130 voltage outputs, RS-485 and relay
  • Interchangeable fixed or remote measurement probe
  • Origo10 recommended for new installations
Vaisala HMP110

Vaisala HMP110 High-Accuracy Humidity and Temperature Probe

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.

Smart Humidity and Temperature Probe for wall mounting HMP1

Vaisala HMP1 Wall-Mounted Humidity and Temperature Probe

The Vaisala HMP1 is a high-accuracy, interchangeable humidity and temperature probe for indoor spaces. It connects directly to an Indigo200 or Indigo300 transmitter to create a compact wall-mounted measurement system.

  • Humidity accuracy up to ±1.0% RH
  • Temperature accuracy up to ±0.2 °C
  • 0–100% RH and −40 to +60 °C measurement ranges
  • Modbus RTU and full Vaisala Indigo compatibility
Hyoda (Japan) Drip Proof Bimetal Thermometer S6

Hyoda S6 Fluid-Filled Dial Thermometer

The Hyoda S6 is a fluid-filled thermometer with a 150 mm dial and remote sensing bulb connected by capillary tube.

  • 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.
Vaisala DPT145 SF6 Multiparameter Transmitter – Discontinued

Vaisala DPT145 SF6 Multiparameter Transmitter – Discontinued

The Vaisala DPT145 provides online dew-point, pressure and temperature measurement for SF6-insulated electrical equipment. The model is being discontinued and should not be specified for new projects.

  • Measures dew point, pressure and temperature
  • Calculates SF6 density, normalised pressure and moisture in ppm
  • RS-485 communication with Modbus RTU
  • Contact Seacom for availability and replacement assessment
Smart Humidity and Temperature Probe for high pressure HMP4

Vaisala HMP4 High-Pressure Humidity and Temperature Probe

The Vaisala HMP4 provides high-accuracy humidity and temperature measurement in compressed air, breathing air, industrial gases, vacuum systems and other processes operating at pressures up to 100 bar.

  • Operating pressure below 100 bar, including vacuum applications
  • Humidity accuracy up to ±0.8% RH
  • Temperature range from -70 °C to +180 °C
  • Standalone Modbus RTU or connection to an Indigo transmitter
back to top