• Toroid Corporation of Maryland

Infrared Sensor (Smart 2 Wire)

Toshniwal Industries offers Thermalert SX, a smart 2-wire infrared sensor from Raytec Inc, USA. This smart 2-wire sensor offers a conventional analogue 4-20 mA output and the highway addressable remote transducer (HART), together with through-the-lens sighting capability. These sensors are 2-wire loop powered and comniunicate over the 2-wire loop using HART. HART allows remote communication with the sensor in either point to point or multidrop installation. Simultaneous analogue and digital communication is provided by super-imposing a frequency FSK signal on the analogue signal. This allows networked control and communication from PC RS-232 serial port using a HART/RS-232 adapter. Thermalert SX units are available with several focussing options and spectral responses with a choice of four spectral responses (8-14 mm, 3.9 mm, 2.2 mm, 5 mm) and temperature ranges from (-) 18°C to 2,000°C, including a special unit for glass application. Laser aiming is also available on selected models to allow precise sensor alignment to pinpoint small targets. Thermalert SX incorporates micro-machined thermopile detector, which provides higher infrared sensitivity and faster measurement speed. The SX features remotely adjustable temperature and output sub-ranges, adjustable emissivity,. ambient temperature check, including all loop maintenance and network functions. Advance signal processing includes adjustable averaging, peak and valley hold, and ambient temperature compensation.