Hyoda Liquid-Filled Thermometers and Temperature Controllers
Hyoda fluid-filled thermometers provide temperature indication and, in selected configurations, electrical contacts for alarm or control circuits. The range includes liquid-filled and gas-filled instruments, with different mounting arrangements, sensing bulbs and temperature scales.
Use this overview to compare the main Hyoda options available through Seacom. Start with whether you need temperature indication, switching, or both, then select the instrument and sensing arrangement for your installation.
Main Instrument Options
- Remote dial thermometers: a sensing bulb and capillary allow the display to be positioned separately from the measurement point.
- Contact-equipped instruments: selected models provide pointer contacts or microswitches for a compatible electrical circuit.
- Direct-mounted alternatives: consider a stem-mounted instrument where the dial can be read at the measurement point.
- Enclosure options: select protection according to the actual model and installation environment.
Liquid-Filled, Gas-Filled or Bimetal?
These terms describe different sensing arrangements. M Series and S6 instruments offer liquid-filled and gas-filled configurations; AY uses a bimetal element. A similar dial appearance does not make the instruments interchangeable.
For M Series and S6, published family coverage extends from −70 to 400°C for liquid-filled versions and −200 to 600°C for gas-filled versions. These are family limits: each instrument is ordered with a particular scale and configuration.
Compare All Six Hyoda Thermometer Listings
| Product / range | Instrument type | Display / arrangement | Indication / switching | Protection | Selection 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 (this page) |
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.
Information Needed for Selection
| Selection detail | What to provide |
|---|
| Temperature |
Normal operating temperature, minimum and maximum, and required scale. |
| Installation |
Local or remote reading, mounting space and preferred dial size. |
| Sensing point |
Measured medium, bulb or stem dimensions, insertion length and process connection. |
| Existing thermowell |
Internal bore, usable depth and connection details. |
| Capillary |
Required routing length and protection from mechanical damage. |
| Switching |
Number of contacts, setpoints and electrical load. |
| Environment |
Indoor or outdoor use, water exposure, vibration and any hazardous-area requirements. |
For replacement work, compare the complete configuration rather than the dial size alone. Confirm mounting dimensions, sensing bulb fit, capillary routing and contact compatibility before ordering.
Related Hyoda Thermometers
- M Series — Remote dial thermometers with 75, 100 or 150 mm dials, optional pointer contacts and WP enclosure options.
- S6 / S6-WP — Fluid-filled thermometer with a 150 mm dial, remote sensing bulb and a choice of IP43 or IP65 enclosure.
- AY Series — Bimetal thermometers for local temperature indication, with 100 or 125 mm dials and adjustable-head QS versions.
- KME-2 / KME-4 — Fluid-filled temperature controllers with one microswitch contact; KME-2 includes an indicator, while KME-4 has no indicator.
- ES-UT — Liquid-filled temperature controller with one or two microswitch contacts and an explosion-proof enclosure; confirm approval suitability for the installation.
Need Help Selecting a Hyoda Thermometer?
Contact Seacom with your operating temperature, mounting arrangement, sensing bulb dimensions, capillary length and any switching requirements. For a replacement, include photographs of the instrument and its complete nameplate so we can help identify the appropriate configuration.
