Hyoda Japan makes protection relays to ensure generators, transformers and distributors can perform safely day in and day out. When there is an anomaly during operation, the protection relay immediately detects it and sends out a warning to prevent a mishap.

Protection relay products include temperature relays for monitoring temperatures, oil flow indicators for monitoring oil flow, dial oil gauges for monitoring oil quantity, impact gas pressure relays for monitoring gas pressure, impact oil pressure relays for monitoring oil pressure, leak detectors for monitoring oil and water leaks, Buchholz relays for monitoring oil flow and the presence of gas, discharge devices for monitoring gas pressure and pressure discharging for normalization, and gas pressure switches for monitoring gas pressure.

Hyoda Japan began selling their protection relays to Japanese electric companies and now supplies electric companies around the world, helping to improve safety.

The hybrid temperature transmitter combines a mechanical dial thermometer with a temperature sensor and its temperature element (such as a resistance thermodetector or thermocouple) integrated with the temperature sensing part, making it possible to issue worksite instructions even when remote.

In the past, the dial thermometer and remote transmission temperature sensor were supplied as separate tools at the worksite, but the hybrid temperature transmitter combines two desirable features in one unit.

The first desirable feature is decreasing the number of connections for the temperature sensor part from two locations to one. The second is placement of the temperature sensor wire through a flexible tube along with the dial thermometer pipe to the instruction unit of the dial thermometer, so the temperature sensor wire for the user can be connected to the instruction unit of the dial thermometer.

The hybrid thermometer transmitter thus decreases costs from the purchase cost to the cost for installation, a great benefit.