![]() As a result of its popularity vs the STL-10, the STH-10 can be found much more commonly than the STL-10. Today, the STH-10 remains a common sight throughout the US and even Canada, often in use at volunteer fire stations as a fire siren, or as a tornado siren for smaller towns. costs in accordance with Federal Highway Administration Memorandums 21-10. There were 2 models produced: The SD-10A is the most common model and is powered by 240V 3-phase power and the. of Highways and Railroad to reconstruct highway overpass at STH 125. It was produced from the late 1950's to the late 70's where it was discontinued. It shared the same rotor and stator assembly with the Model 5AT/5BT. In 1995, the STH-10 was discontinued along with the STL-10 as part of restructuring, though the STH-10A would be reintroduced not long after, until it was discontinued in 2005 and replaced by the Eclipse-8 in Federal's lineup in 2006. The Federal Signal SD-10 was a dual-toned, 9/12 port, 10HP electromechanical siren produced by the Federal Sign & Signal Corporation. The STH-10 became a popular siren, outselling the STL-10 significantly. ![]() The STH-10 came in both single and three phase variants, the STH-10B and STH-10A respectively. While it was mainly used as a fire siren, it easily doubled as a standard civil defense and weather siren when necessary. It’s an 8 port single tone siren producing a sound of 500Hz, joining the legendary Model 2 as a low tone siren, but it’s a much louder and capable siren for covering large areas. The STH-10 was designed as a multipurpose siren mainly for use at fire stations, as it had better range and volume than Federal's Model series. This unit was made as a direct replacement for the STH-10 siren in 2006, with a much more efficient DC motor making it capable of full battery operation. To purchase Work Truck products or Signaling Devices online, simply click on the image below. Use the form below to find the representative nearest you. The siren ran on a 10HP motor located on top of the siren. Where to Buy Federal Signal has an extensive and knowledgeable network of business partners who are available to help you choose the right solution for your business. This very simple design meant that the siren was very reliable and easy to keep maintained, and the horns allowed it to reach 115db at 100 feet, 1db more than its lower-pitched brother. The siren is very simple in design, being little more than the chopper, stator, motor, intake and horns. The STH-10 was introduced in 1955 as a higher-pitched option to supplement Federal's existing 10HP STL-10 siren, using a 12-port rotor with 12 horns instead of the 7-port the STL-10 uses. It proved to be one of the most popular of Federal Signal's omnidirectional sirens and gained a reputation as a reliable multipurpose siren. ![]() This unit was installed in 1994 and is being replaced due to age. The Federal Signal STH-10 was a single-tone 10-horsepower omnidirectional siren produced by Federal Signal over a span of 50 years. Federal Signal STH-10 Outdoor Warning Siren (Tornado Air Raid). ![]()
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