TxBlock-USB Program. 2-Wire Temp. Transmitter, head mount 4-20mA output. Programmable input: thermocouples type J,K,T,N,E,R,S,B, and PT100, PT1000 and NTC RTD, 2-wire loop powered 4-20mA or 20-4mA output. 2, 3 or 4-wire PT100 input with linearization output. Accuracy: ±0.1% full scale for PT100, mV and thermocouples. ±0.3% NTC Working temperature:-40 to ...