SIEMENS SITRANS TH420 (HART, universal)

SITRANS TH320 and TH420 combine perfect measurement and intelligence at any temperature and condition. Real reliability is guaranteed, for example, by the dual sensor input of the TH420 incl. 4-wire sensor connection and hot backup function. In case of a sensor failure, the transmitter automatically switches to the second sensor, and the values​​continue to be recorded seamlessly and without loss.

Detail

Input: Resistance thermometers, thermocouples, resistance-type sensors, DC sources

Output: 4 ... 20mA (SITRANS TH320), HART (SITRANS TH320/420),Profibus PA (SITRANS TH420)

Operational temperature

Standard: -50 … +85 °C (-58 … +185 °F)

SIL: -40 … +80 °C (-40 … 176 °F)

Approvals: ATEX, IECEx, FM, CSA

                  EACEx, NEPSI, Inmetro

Certificates SIL 2/3 certification (HART only)

Benefits

• High availability during measurement by hot backup function (SITRANS TH420)

• High reliability and long-term stability – sensor trim (Callendar-van-Dusen) and sensor drift detection (SITRANS TH420 only) for high accuracy and accelerated calibration time 

• Avoidance of production stop because of measurement failures

• Best cost-benefit ratio for facility management

• Cost reduction through anticipatory maintenance

• Withstanding safety-critical environments - Extended temperature range up to -50°C and SIL2/3 approvals