Libratherm Instruments Private Limited

Two wire isolated head mount temperature transmitters

Description:

Libratherm offers Miniature Head Mount Simplex, Duplex and Simplex-Isolated Two-Wire Temperature Transmitter Model LTX-3000-H-1, LTX-3000-H-2 and LTX-3000-HI-1, which accepts (Pt-100) or thermocouple or variable resistance signal as the input and provides DC current output of (4-20) mA proportional to mV or resistance values. These transmitters are extensively used to minimise the effect of electrical noise and eliminate the need for long runs of special compensating and three-wire cables, since an ordinary pair of copper wires can easily transmit the measured temperature without the drop or loss of signal. In addition, transmitting the current signal is more advantageous since it is less susceptible to industrial RFI/EMI noise than the voltage signal. These transmitters are linearly calibrated to the signal produced by a thermocouple or RTD sensor, not the actual temperature. In the isolated version the power supply ground and input signal from the sensors are galvanically isolated.

LTX-3000 requires no separate power supply as it is powered by current drawn from the current loop and is thus inherently safe when used with appropriate barriers. It is very compact, affordably priced, and can be directly mounted inside standard heads of thermocouple or RTD sensors. It can also easily fit inside flameproof/weatherproof heads or junction boxes. It is available for different thermocouples, and RTD (Pt-100) units are properly calibrated for the required temperature range with ZERO and SPAN adjustments for on-site calibration. LTX-3000 comes in the standard size of 44 mm OD and 26 mm height (including terminals), with a centre-to-centre mounting hole dimension of 33.0 mm, to fit easily into standard die cast aluminum heads.

LTX-3000-H-2 Two Wire Temperature Transmitter (Head Mounted) for Duplex Sensor.
Libratherm offers Duplex Sensor Two Wire Temperature TransmitterModel LTX-3000-H2, which accepts (Pt-100) or thermocouple or variable resistance signal as the input and provides dc current output of (4-20) mA proportional to mV or resistance values. These transmitters are extensively used to minimize the effect of electrical noise and to eliminate the need of long runs of special compensating and three wire cables since an ordinary pair of copper wires can easily be used to transmit the measured temperature without the drop or loss of signal. In addition, transmitting the current signal is more advantageous, since it is less susceptible to industrial RFI/EMI noise compared to the voltage signal. These transmitters are linearly calibrated to the signal produced by a thermocouple or RTD sensors and not to the actual temperature.

• Microcontroller based design.
• Universal single or dual industrial process input (user selectable).
• RS-485 MODBUS RTU serial interface.
• Bright red LED display.

LTX-3000-WI Isolated Two Wire Temperature Transmitter (In Weatherproof enclosure field mounted).

Libratherm offers Isolated Two Wire Temperature Transmitter Model LTX-3000-WI, which accepts (Pt-100) or thermocouple or variable resistance signal as the input and provides dc current output of (4-20) mA proportional to mV or resistance values. These transmitters are extensively used to minimize the effect of electrical noise and to eliminate the need of long runs of special compensating and three wire cables since an ordinary pair of copper wires can easily be used to transmit the measured temperature without the drop or loss of signal. In addition, transmitting the current signal is more advantageous, since it is less susceptible to industrial RFI/EMI noise compared to the voltage signal. These transmitters are linearly calibrated to the signal produced by a thermocouple or RTD sensors and not to the actual temperature.

LTX-3000-W Two Wire Temperature Transmitter (In Weather proof IP 65 enclosure and field mounted).

Libratherm offers Miniature Head Mount Two Wire Temperature Transmitter Model LTX-3000-W, which accepts (Pt-100) or thermocouple or variable resistance signal as the input and provides dc current output of (4-20) mA proportional to mV or resistance values. These transmitters are extensively used to minimize the effect of electrical noise and to eliminate the need of long runs of special compensating and three wire cables since ordinary pair of copper wires can easily be used to transmit the measured temperature without the drop or loss of signal. In addition, transmitting the current signal is more advantageous, since it is less susceptible to industrial RFI/EMI noise compared to the voltage signal. These transmitters are linearly calibrated to the signal produced by a thermocouple or RTD sensors and not to the actual temperature.