Hyoda M Series Fluid-Filled Dial Thermometers
The Hyoda M Series provides dial temperature indication using a sensing bulb connected to the instrument by a capillary tube. Its wall-mounted arrangement allows the dial to be positioned separately from the measurement point.
Choose an indication-only thermometer or a version with pointer contacts for a compatible alarm or control circuit. Specify the dial size, temperature scale, sensing bulb, connection and capillary arrangement to suit the installation.
Compare M Series Models
| Feature | M3 | M4 | M6 |
|---|
| Dial diameter |
75 mm |
100 mm |
150 mm |
| Drip-proof version |
M3 — IP43 |
M4 — IP43 |
M6 — IP43 |
| Waterproof version |
M3-WP — IP65 |
M4-WP — IP65 |
M6-WP — IP65 |
| Contact configuration |
Indication only or one pointer contact |
Indication only, one or two pointer contacts |
Indication only, one or two pointer contacts |
| Maximum-temperature pointer |
Not available |
Optional |
Optional |
Temperature Ranges and Capillary Options
| Specification | Published options |
|---|
| Liquid-filled range coverage |
−70 to 400°C |
| Gas-filled range coverage |
−200 to 600°C |
| Liquid-filled capillary length |
Single: 10 m; double: 30 m |
| Gas-filled capillary length |
50 m |
| Contact rating |
AC 100 V / 0.4 A; AC 200 V / 0.2 A |
The temperatures above describe the available family coverage, not the scale of every instrument. Select a suitable standard range and confirm the permissible capillary length for the chosen configuration.
Product Specifications and Dimensions
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 |
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.
Choosing the Right Configuration
- Temperature scale: provide the normal operating temperature and the expected minimum and maximum.
- Dial visibility: choose the dial diameter according to the mounting location and reading distance.
- Sensing bulb and connection: confirm the required insertion length, bulb diameter, process connection and any thermowell dimensions.
- Capillary routing: measure the route between the sensing point and dial, allowing for installation access and protection from damage.
- Enclosure: choose the protection rating for the installation environment. IP65 does not specify suitability for immersion.
- Electrical contacts: confirm the switching requirement and circuit compatibility when selecting a contact-equipped model.
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.
- 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.
- 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 M Series Thermometer?
Contact Seacom with your temperature range, dial size, capillary length, sensing bulb dimensions and connection requirements. For a replacement, include photographs of the existing instrument, nameplate and mounting arrangement so we can help identify a suitable configuration.
