ATEX 4-20mA Load Cell Amplifier (ALA5)

ATEX 4-20mA Load Cell Amplifier (ALA5) The ALA5 is an ATEX approved strain gauge/load cell amplifier designed for operation within hazardous zones 0,1 & 2. The high performance amplifier provides 2-wire 4-20mA current loop output and connects in-line for a range of signal conditioning for strain gauges, load cells, pressure […]

ATEX 4-20mA Load Cell Amplifier (ALA5)

The ALA5 is an ATEX approved strain gauge/load cell amplifier designed for operation within hazardous zones 0,1 & 2.

The high performance amplifier provides 2-wire 4-20mA current loop output and connects in-line for a range of signal conditioning for strain gauges, load cells, pressure and torque transducers. Intrinsically safe to EN60079-11 (previously EN 50020) standards.

The device can be connected to ATEX approved equipment within the hazardous zone or to non-approved ATEX equipment outside the hazardous zone provided that a suitable barrier is used.

Designed for fitting in-line to strain gauge sensors such as load cells, the amplifier is housed within a stainless steel IP67 NEMA 6 EMC protected enclosure and is supplied with 1m strain gauge cable and 5m output cable.

An OEM option is available for customers wishing to embed the ATEX amplifier within the sensor. Please note: the ICA5ATEX is approved for incorporation into load cells and other enclosures. Please contact us to discuss your requirements.

  • High performance amplifier certified for ATEX Hazardous Zones 0, 1 & 2
  • Designed for fitting in-line to strain gauge sensors such as load cells
  • Intrinsically Safe to EN60079-11
  • Environmentally sealed to IP67
  • Provides 2-wire 4-20mA current loop output
  • Fast calibration via gain and offset trim
  • Bridge impedance min 350 Ohms max 5000 Ohms
  • Wide temperature range -40C to 85C
  • Supplied with 1m strain gauge cable and 5m output cable
  • Robust design, reverse polarity & short circuit protected
  • OEM option available
Parameter Min Typ Max Units Notes
Electrical & Environmental     
Supply Voltage Range  9  24 28 Volts
Operating Current  4  –  20  mA
Operating temperature range  -40  –  85  ºC
Storage temperature range  -40  –  125  ºC
Reverse polarity protection  –  –  -28  Volts
Measurement     
Bridge excitation  1.05  1.11  1.16  Volts 1000 Ohms load cell connected
Bridge impedance  350  1000  5000  Ohms Recommended bridge impedance is 1000 Ohms
Bridge sensitivity  0.5  2.5  55  mV/V Factory setting is the typical value shown. For other values an alternative calibration resistor can be fitted (see manual).
Output current range  4  –  20  mA
Output load  –  –  800  Ohms At 24V supply minimum
Bandwidth  DC  –  1000  Hz
Zero adjustment  –  ±2  –  %FR
Span adjustment  –  ±8  –  %FR
Linearity  –  0.02  –  %FR
Zero temp stability  –  0.001  0.005  ±%FR/ºC
Span temp stability  –  0.007  0.014  ±%FR/ºC
General Notes:
The voltage between either of the power supply connections and the load cell shield should not exceed 50V. Any leakage will be greater than 10M Ohms.
FR = Full Range

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