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Guide for Appliance Recyclers June 2004 <br /> Step 3: Disconnect the attached wires and examine the attached switch. The <br /> mercury switch typically is made of glass, so the mercury inside is visible. <br /> Source:Vermont Agency of Natural Resources,Environmental Assistance Division <br /> (www.am state.vtusrdec/e&&mercug1appman.pM <br /> Step 4: Properly manage the switch in accordance with the section of this guide <br /> titled, "HANDLING AND RECYCLING MERCURY SWITCHES." <br /> Gas Ranges <br /> Gas ranges, ovens, and stoves are ignited using either an electronic ignition system or <br /> a pilot light. Most pilot-light ranges have a flame sensor, which contains mercury, to <br /> shut off the gas supply to the burner when the pilot light is not burning. The mercury <br /> • flame sensor is attached to the gas burner, which is located beneath the oven cavity in <br /> the broiler pan. <br /> The mercury flame sensor is made up of three interconnected parts. <br /> • a safety valve sensor probe ("probe"), <br /> • a safety valve capillary tube ("capillary"), and <br /> • a gas safety valve control ("safety valve"). <br /> The probe usually protrudes into the pilot-light area. It is connected to the capillary, <br /> which is, in turn, connected to the gas safety valve. The safety valve usually is attached <br /> to the rear wall of the broiler pan cavity, where it connects to the base of the gas burner <br /> assembly. The mercury is contained in the probe and capillary sections of the flame <br /> sensor assembly. To prevent mercury leakage, remove all three components of the <br /> flame sensor in one piece. Estimated time to remove a mercury flame sensor is 10 to <br /> 60 minutes. <br /> Gas ranges also have temperature-sensing devices that do not contain mercury. These <br /> sensor probes usually are found inside the oven or below the upper burners, where they <br /> regulate temperature through wire connections to temperature or oven control knobs. <br /> The probes for these devices usually are filled with oil or a sodium/potassium mixture; <br /> their capillaries generally are made of non-ferrous metals such as copper. The probes <br /> • and capillaries of mercury flame sensors, on the other hand, are composed of ferrous <br /> metals such as iron or steel. As a general rule, probes made of magnetic metals <br /> 16 <br />