This NSi Industries DTWH40 digital water heater time switch accepts 120/240 VAC input and its DPDT contacts can activate a 40 amp load. The switch automatically detects the input voltage and does not require manual setting. This energy-saving switch allows water heater on/off operation with individualized daily operation. The timer includes seven pairs of set points and has a minimum cycle time of one minute. The double-pole double-throw (DPST) contacts are housed within a plastic enclosure that meets NEMA-1 standards for dust resistance and has a lockable hasp. The enclosure is suitable for indoor use and mounts to an external surface. This time switch is Underwriter Laboratories (UL) listed and Canadian Standards Association (CSA) certified for quality assurance and is suitable for controlling water heaters.

Specifications

Automatic switches are used to turn on or off electrical devices and are activated by time, light, and motion. Time activated switches (also known as timers) operate at preset time intervals during a daily or weekly period and can be either mechanical or electronic. Mechanical timers feature a dial with multiple pins to set the on/off time intervals. Electronic timers feature an LCD display and pushbuttons to set the time intervals. Light activated switches (also known as optical or photo) operate when ambient light levels reach preset values, generally measured in foot candles. Motion-activated switches (also known as motion sensors) operate when an electronic field of a preset range is interrupted. These switches can include energy saving logic that uses combinations of time, light, and motion to operate and can include one or more device outlets or circuit contacts. Automatic switches are used to control indoor lights, outdoor lights, appliances, and small equipment motors.

NSi Industries manufactures electrical components and sensors, lighting products, and energy management products. The company, founded in 1975, is headquartered in Huntersville, NC.