Bimetal Thermostats feature open frame design.

Press Release Summary:

Series 30003 Open Frame Bimetal Thermostats provide narrow control of surface or airflow temperatures in various OEM products, operating within 100-482°F range with 5-13°F differential. Offering ±5% factory temperature setting tolerance, units are compliant to UL 873 and are UL and cUL component recognized. They feature corrosion-resistant nickel-plated steel construction, single screw mounting, and are available in adjustable or preset fixed temperature models.

Original Press Release:

Fenwal Series 30003 Open Frame Bimetal Thermostats

Ashland, MA - Fenwal Controls, a leading manufacturer of thermostats, high limits and temperature controls, has introduced the Series 30003 Open Frame Bimetal Thermostats. These temperature controls function on the principle of the differential expansion of metals: the contacts open when the set temperature is reached, and close when the temperature drops. Series 30003 are small differential devices to provide narrow control of surface or airflow temperatures within many different OEM products, including heater fans, commercial and countertop cooking appliances, laminating equipment, dry and steam irons, water heaters, and airflow temperature sensing equipment.

"The Fenwal Series 30003 thermostats are built for long, reliable performance in OEM applications," said Jerry Harting, Director of Sales and Marketing for Fenwal Controls. "This new family of open frame thermostats is available factory pre-set or adjustable, complementing and expanding the range of applications of our well-known THERMOSWITCH® at a price point OEMs demand."


o Adjustable or pre-set fixed temperature models

o Easy mounting with a single screw

o Corrosion resistant nickel-plated steel

o Narrow differential provides close temperature control

o Operates within 100 - 482°F (37 to 250°C)

o +/- 5% factory temperature setting tolerance

o 5-13°F differential

o UL and cUL component recognized

o Complies to UL 873

For more information or to download a data sheet, visit or contact Jerry Harting, Sales Director at 508.881.2000 ext. 2207 / e-mail at

About Fenwal Controls

Fenwal Controls was founded in 1935 to produce the patented THERMOSWITCH® temperature controller, a product still widely used today appliance and fire protection services. In 1965, Fenwal pioneered electronic gas ignition controls and today is a global marketer and manufacturer of a full range of standard and configurable gas ignition and temperature controls. Markets include HVAC, boilers, water heaters, commercial cooking equipment and fire protection. Fenwal Controls is an operating unit of Kidde-Fenwal Inc., a division of the UTC Fire & Security sector of United Technologies Corporation.

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