<p>Designed to complement the extensive Series 700<br /><br /> Pressure and DP switches, Series 700 Temperature<br /><br /> Switches offer accurate, reliable switching in a robust cast<br /><br /> enclosure. Featuring:</p><br /> <ul><br /> <li>&#160;RANGES FROM –50°C TO +400°C</li><br /> </ul><br /> <p>Both vapour filled and gas filled systems are available.<br /><br /> Vapour filled systems have the advantage of negligible<br /><br /> ambient temperature effects on the switching point.<br /><br /> Gas filled temperature systems provide larger ranges and<br /><br /> are more suited to applications where switching points are<br /><br /> close to ambient temperature.</p><br /> <ul><br /> <li>&#160;WIDE RANGE OF OUTPUT SWITCHES</li><br /> </ul><br /> <p>Series 700 pneumatic output switches make extensive use<br /><br /> of the HNL precision pilot valve (PPV). This valve provides<br /><br /> a final switching differential equal to that<br /><br /> obtained by the use of a sensitive electrical<br /><br /> microswitch.<br /><br /> Versions are also available for electrical switching in<br /><br /> hazardous areas and non-hazardous areas (see data<br /><br /> sheets TD700 THAZ and TD700 TELC).</p><br /> <ul><br /> <li>DIRECT AND REMOTE MOUNTING VERSIONS</li><br /> </ul><br /> <p>AVAILABLE<br /><br /> Direct mounting (as shown opposite) allows the switch to<br /><br /> be screwed directly into a thermowell (pocket). With remote<br /><br /> mounting versions the temperature bulb is<br /><br /> secured in the thermowell and connected to the switch<br /><br /> housing via a capillary tube.<br /><br /> Both types are available with aluminium housings for<br /><br /> general industrial use or stainless steel housings for<br /><br /> ultimate protection from the environment.<br /><br /> The temperature system in all versions is fully welded in<br /><br /> 316 Stainless Steel.</p><br /> <ul><br /> <li>&#160;FIELD ADJUSTABLE</li><br /> </ul><br /> <p>The setpoint of the switch is adjusted by means of a<br /><br /> capstan head screw, located within the lower section of<br /><br /> the enclosure.</p><br /> <ul><br /> <li>&#160;ACCURACY AND REPEATABILITY</li><br /> </ul><br /> <p>These switches provide excellent repeatability and long<br /><br /> in-service life. In addition switching differentials are typically<br /><br /> below 2% of range.</p>