OHD5R-85B

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Temperature Sensors - Thermostats - Mechanical

OHD5R-85B is a type of mechanical temperature sensor or thermostat used in a variety of applications. The reliable, economical product is built with the precision engineering to accurately monitor temperatures while protecting equipment from hot or cold extremes. It provides protection for residential and light commercial HVAC systems as well as industrial and commercial applications.

Application Field and Working Principle:

The OHD5R-85B temperature sensor or thermostat is used in many industry applications. It is often used in HVAC systems, industrial process systems, medical equipment, and refrigeration and air conditioning systems. OHD5R-85B is a single pole, single throw (SPST) thermostat that maintains an application’s set temperature by sensing the environment’s temperature with a sensing bulb. It uses a bimetallic element as a temperature-sensing device. When the temperature rises above the specified set-point, the metal members vibrate due to the temperature difference, resulting in a temperature change. This causes the electrical contact to open or close, thereby providing the on/off control necessary to maintain the correct temperature.

OHD5R-85B is commonly used in systems that require an on/off control of a single stage of equipment operation. The thermostat has two electrical contacts, one that opens when the temperature reaches its preset limit and one that closes when the temperature drops below the preset limit. This control action is known as Direct Acting Control. The mechanical design of the OHD5R-85B thermostat advantages include an accurate temperature/position relationship, long service life, and quick response time.

In addition, the OHD5R-85B has a wide temperature range and adjustable set point options. The adjustable set point allows a range of temperatures to be set in order to be precise for the specific application. The thermostat has a temperature range of -40 °F to 150 °F and is available with a variety of set points.

To improve overall performance, the OHD5R-85B is designed with a snap-switch action with a wide differential. The wide differential means the difference between opening and closing temperatures is greater than the temperature at which the switch actuates. This improves equipment performance by decreasing snap switch cycling and providing stable temperature control.

The OHD5R-85B is UL-listed and CSA certified and is designed for a variety of applications, including residential and commercial HVAC systems, process control, and medical appliances. The thermostat is available in a variety of configurations and mounting styles, such as top-, side- or bottom-mount, and single- and two-stage applications.

OHD5R-85B is a reliable, economical mechanical temperature sensor or thermostat that provides consistent and accurate temperature control. It serves a variety of applications and it is designed to maintain an application’s set temperature, protect equipment from heating and cooling extremes, and perform safely and reliably.

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