Loop-powered isolated temperature transmitter for RTD, TC, mV, Ohm

T121 is a high-precision temperature transmitter designed for head-mounted installation, suitable for machinery, factories, installations and process industries. It is intended to shorten measurement time, reduce debugging and maintenance costs. This device converts input signals from Cu50, Cu100, Pt100, Pt500, Pt1000, Ni100, Ni120, Ni1000, TC probes (J, K, R, S, T, B, E, N, L), potentiometers, and mV into current normalized signals through a 4..20 mA loop (2-wire technology) with 16-bit resolution. The key features of this transmitter are its wide operating temperature range (-40…85°C), small size, quick connection via push-in spring terminals, and 2-channel current isolation between input and output to ensure data integrity. T121 has been certified for ATEX II 3G Ex nA IIC T4 Gc X (gas) and II 3D Ex tc IIIC T135°C Dc X (dust). All parameters can be configured using a Windows software through a USB->UART TTL converter (such as EASY USB or S117P1 converter (USB->RS232, RS485, UART TTL)).