Gefran 40T: Temperature Indicator with Alarm, 48x48
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SKU: product options

40T series: Thermocouples (J,K,T,R,S…), RTD (Pt100, Pt1000…), thermistors, analog 0(4)-20mA, 0(2)-10VDC

The Gefran 40T48 configurable indicator / alarm unit is widely used in industry for general process monitoring involving transmitters (4…20mA, 0…10V) and temperature sensors. It is preferred in applications with limited space.

  • Faceplate configurable input
  • Protected by a personal code
  • Configurable by a serial link
  • Transmitter power supply incorporated
  • Custom thermocouple linearisation available
  • Internal linearisation for engineering units
  • Labels provided for the more common physical units
  • Sampling time and trip intervention programmable between 15 and 120msec with resolution between 2000 and 8000 steps
  • Retransmission of the measured variable signal
  • 3 trip points, completely configurable from the faceplate
  • 4 trip points completely configurable from keyboard
  • RS485 optically isolated serial line
  • Rapid configuration from PC with Winstrum package
  • CE, RoHS Certifications

Gefran 40T 48 Indicators

Gefran 40T indicators offer exceptional versatility due to the wide selection of sensor input options, functions and hardware configuration. Input type, alarm types and the function of the keys on the faceplate are software selectable. Retransmission output and digital communication facilitate easy interface with supervisory systems and SCADA applications.

It is preferred in applications with limited space. Input configuration is software selectable. For other indicators choose from:

  • 40A series: 20mAac, 50mAac 200mAac, 1Aac, 5Aac, 2Vac, 20Vac, 200Vac, 500Vac
  • 40B series: strain gauge (autoranging between 1.5 to 3.3mV/V), Potentiometer
  • 40F series: Frequency, inductive, capacitive (Namur, 2/3 wire), encoder, mircorswitch, 30-500Vac


  • Choose from a wide range of software selectable inputs.
  • Connect your input device (4-20mA transmitter, loadcell…) directly the 24V/10V on-board supply.
  • Reset maximum/minimum register or "zero" the input via keys on the faceplate.
  • Trigger pre-configured functions via remote switch.
  • Use the "flash" function to read product and freeze during gaps on continuous production lines.
  • For system testing during commissioning use the keys on the faceplate to activate the alarm outputs.


Microprocessor based indicator in both 48x48 (1/16 DIN) formats manufactured with SMT. The instruments have a lexan membrane faceplate (guaranteed to IP65) which has 3 keys, a 4 digit display and 3 indicating LED's for the output statuses. The input signal can be selected from a wide range of sensors:

  • Thermocouples of type: J, K, R, S, T, B, E, N, L GOST, U, G, D, C
  • Resistance thermometers Pt100, Pt100J 2 / 3 wire
  • PTC and NTC themistors
  • Linear inputs 0 to 60/12 to 60mV, 0 to 20/4 to 20mA, 0 to 10/2 to 10/0 to 5/1 to 5/0 to 1/0, 2 to1V

The selection is made using the faceplate keys and correct input terminals. No external shunt or adapter is required. A digital input (24Vdc/4mA) is available for resetting, hold, flash, peak handling or releasing latch. No external shunt or adapter is required. A digital input (24Vdc/5mA) is available for resetting, hold, flash, peak handling or releasing latch.

The instruments have a maximum of 4 outputs that can be mechanical relays (5A/250V) or logic outputs 24V±10% (10Vmin / 20mA). One output of 4 to 20mA (max. 500 Ohm) is available for retranmitting the measured input signal. The retransmission output, the digital input and the third output are alternatives.

The options include a triac output that can directly drive resistive loads up to a maximum of 1A at 240V.

The programming of the instrument is made easy by grouping the parameters in function blocks (CFG for the alarm hysteresis, Inp for the inputs, Out for the outputs...) and by a simplified data entry menu. The configuration can be simplified even further using the PC programming kit made up of a connection cable and a menu guide program that runs under Windows. A configurable personal software protection code (password protection) can be used to restrict the levels of editing and displaying the configuration parameters.

Sensor Inputs: 
Number of inputs:1
Thermocouples:J, K, T, E, N, S, R, B, LGost, U, G, D, C, custom
with scales ºC or ºF (IEC 584)
Resistance Thermometers:Pt 100 DIN43710 (3-wire), Pt 100 Japan, custom
Thermistors:PTC, NTC (1K/25 ºC), custom
Linear:0...20 mA, 4...20 mA, 0...60 mV, 0...1 V, 0...5 V, 0...10 V
Sampling time:120 - 60 - 30 - 15 msec
Precision:0.2% ± 1 digit
Digital input:Optoisolated passive PNP isolated 1500 V
Maximum number of outputs:4
Relay:max. 5 A, 250 V resistive load
Alarm units, alarms, on / off control
Logic:24V (10V min / 20mA max)
Alarm units, alarms, on / off control
Analog:0...10V, 4...20 mA (Rmax = 500?) res. 12 bit not isolated
Retransmission of variable
Transmitter power supply:24 Vdc ± 10% non- stabilized, 50 mA 15Vdc for transmitter,
50 mA 1,2 V for potentiometer
Power supply:20...27 Vac/dc, 100...240 Vac/dc; ± 10% 50/60 Hz
Digital communication:RS485, 1200...19200 baud
Faceplate protection level:IP 65
Working temperature:0 to 50ºC
Gefran eXpress Software
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