Hyoda's thermometers measure the future.      
Energy Sources

Dial thermometers

Power Plants

Protective relays
for transformer

Cities & Lives

Transformer for


Protective relays for
traction transformer

The Chairman of Higashi Osaka Chamber of Commerce and NIKKAN KOGYO SHIMBUN
「Hyoda Instruments Corporation was selected as one of “2009 300 of Japan’s Dynamic Monodzukuri(Manufacturing)SMEs」

The high-performance products manufactured
by Hyoda Instruments Corporation are spreading from Japan to various countries in the world.
Hyoda is striving to ensure happy days in the future for the people and to protect the beautiful environment for the next generation.
Hyoda uses the thermosensing technology to see the tomorrow's world.
Warm now, and sense tomorrow! Hyoda thermometes the future.

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THERMOMETER FOR VEHICLE TRANSFORMER Thermometer for Traction Transformer
Since mobility has been remarkably improved in these days, high-speed and high-performance transportation systems, such as railroads, have been introduced to our daily lives. Hyoda's protective devices are used for these new transportation systems to ensure safe, efficient, and comfortable transportation. For the bullet trains of Shinkansen Lines, Hyoda's car thermometers and temperature detectors are adopted.

In March 1999, our head office and plant obtained the ISO 9001 approval.

Thermometer for Traction Transformer


Dial thermometers

Fluid Filled Thermometer
Hybrid temperature transmitter
Bimetal Dial Thermometers

Protective relays for transformer

Temperature Indicator
Dial Oil Gauge for Consavator of Oil Immersed Transformer
Sudden gas pressure reiay
Sudden oil pressure relay
Buchholz relay
Oil Flow Meter for Oil Immersed Transformer
Automatic return pressure relief device
Leak Detector for Water Cooler
Thermometer with Oil Gauge
Dial Thermometer with Electric Contact for Traction Transformer
Oil Flow Meter for Traction Transformer
Pressure relief valve for traction transformer
Dial Thermometer with Pointer Contact for Molded Type Transformer
Search Coil

Gas density switch

SF6 Gas Pressure Switch

Thermo sensors

Resistance Bulbs

Protective tube

Screw type
Flange type
Solid bored type
Welding type

Pressure gauges

General pressure gauges
Vacuum Gauge
Compound Pressuer Gauge
Pressure Gauge with Electric Contact
Pressure Switch
Weather-Proof Pressure Gauges
Economical Service Pressure Gauges
Vibration-Proof Type Oil Filled Pressure Gauges
Small Size Pressure Gauge
Stainless Steel Case Pressure Gauges
Differential Pressure Gauge
Receiver Gauge
Duplex Pressure Gauge (Coupled Barrels Type)
Low Pressure Gauge
Diaphragm-Sealed Type Pressure Gauges

for air conditioning system

Duplex Gauges
Digital thermometer of air-conditioner
Bimetal Dial Thermometers

Thermometer for public bath

Thermometer for Bath

Goods in stock

Fluid Filled Thermometer
Bimetal Dial Thermometers




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