The Dwyer TSW-250 Dual Stage Digital Temperature Switch combines the trusted, reliable TS family of temperature controls and an installation friendly weatherproof enclosure. By using the same programming parameters as our Series TS2 and Series TSS2, set up can be quickly completed using the front keypad or by using the TS2-K configuration key. In order to prevent tampering from unauthorized users, a parameter lock physical jumper and software passcode security are standard in the unit. The bright, easy-to-read LED display shows the current output status and the temperature measurement. The multiple conduit knockouts on the TSW250 give flexibility to the installer to determine the best location for the conduit entry. Another installation friendly feature of the TSW-250 is the ability to quickly jumper the line voltage to the common of the output relay using fast tabs. In order to reduce time in selecting models, the TSW-250 has universal high and low power supply models and field selectable engineering units with a 12 to 24 VAC/VDC power supply. The TSW-250 includes one TS-1 PTC thermistor probe.