Strain Gauge Amplifier | Signal Conditioner (SGA A&D)

SGA strain gauge amplifier for load cell signal conditioning in waterproof IP65 NEMA4 bulkhead mountable case.
Load Cell Signal Conditioner showing Din Rail Mounting Option (D4) Shows pcb board for the SGA/A & D with mains transformer fitted for AC and DC supplies
  • Strain Gauge Amplifier ideal for load cell signal conditioning
  • Bridge excitation of 10V DC with drive for four 350 Ohm load cells
  • Selectable 1 to 5000 Hz filter for test & measurement applications
  • Selectable sensitivity from 0.1 to 30 mV/V using switches and fine trim potentiometer
  • Switch selectable offset ±70% FS using switches and fine trim potentiometer
  • User selectable analogue output in standard voltage or current format
  • The SGA A/D (shown in main photo) comes complete with case, with option of DIN rail mounted case (D4) as shown on left or as a pcb board of the load cell signal conditioning module

*NEW MODULE NOW AVAILABLE*

For half or quarter Bridge Connection (SGABCM)

  • For half or quarter Bridge Connection on (SGABCM)
  • Provides local and remote shunt calibration
  • Supports half and quarter bridges
  • High stability resistors
  • Compatible with all variants of the SGA A/D
  • Easy installation
  • Retro fit PCB

 The strain gauge signal conditioning module is a high performance signal conditioner for single or multiple strain gauge bridge sensors such as load, force, pressure and torque.

The SGA A/D provides strain gauge signal conditioning for load cells and offers a wide bandwidth and a wide input signal range. The device can be powered from AC or DC supplies providing excitation for up to four x 350 Ohm strain gauge bridges.

The conditioned output signal can be selected from 0-20mA, 4-20mA, 0-10V, 0-5V, ±5V or ±10V.
Options include: Isolated DC supply, DIN rail mount and OEM module.

Supplied in a waterproof IP65 NEMA4 bulkhead mountable case and is available with AC or DC power supply options. The strain gauge signal conditioning module is robust and fully CE compliant.

For a digital version of the strain gauge signal conditioning module with set point relays, communications and display options please see our Load Cell Amplifier Model LCA15.

For further information on strain gauge signal conditioning for load cells see ‘What is a Signal Conditioner?'

Parameter
  Min Typical Max Units
Power supply (SGA/A):- (110/230Vac) 50 - 60Hz  99/198 110/230  126/253  V AC
Power supply DC :- 18    24  V DC (Note: 1)
Power supply IS12/24 - Isolated   36  V DC
Power supply current DC :- (depends on loading) 50  90  200  mA
Bridge excitation 350R Strain Gauge 9.5  10  10.5  V
Bridge resistance 85      Ohms
Bridge sensitivity (Switchable) 0.06    30  mV/V
Gain adjustment (Pot - fine adj.) 0.06    1.0  mV/V (Note: 2)
Offset adjustment (Pot - fine adj.) -1.25    +1.25  %FR (FR=Full Range)
Offset adjustment (Switchable - coarse adj) ±1.25   ±79 %FR
Output load (Voltage output)     mA
Output load (Current output)   500  Ohms
Bandwidth (No filter and > 2mV/V) - 3dB point DC    kHz
Filter cut-off (Switchable ranges) - 3dB point   5000  Hz
Zero temperature coefficient at 2.5mV/V)   0.002  0.009  %FR/ ºC at 2.5mV/V FR
Span temperature coefficient   0.007  0.01  %FR/ ºC
Linearity   0.03    %FR
Gain stability -1st 1000 Hours   0.2    %FR
Gain stability - 2nd 1000 Hours   0.1    %FR
90 day Offset stability   3.3    uV
Output load stability gain (0 - 100%)     0.01  %FR
Output load stability offset (0 - 100%)     0.01 %FR
Power supply rejection gain (0 - 100%)     0.01  %FR
Power supply rejection offset (0 - 100%)     0.01 %FR
Operating temperature range -10    50  ºC
Storage temperature range -20    70  ºC
Humidity     95  %
Note:1 18V max at full load. Note:2 Depends on sensitivity settings
Output Options Set by On-Board Switch    
±10V, ±5V, 0-10V, 0-5V, 0-20mA, 4-20mA
Connections    
Field screw terminals - 2.5mm² rising clamp
Enclosure    
ABS case 160 x 80 x 55 sealed to IP65 fitted with 3 off cable glands
Controls    
Gain pot, Offset pot, Coarse gain switches, Coarse offset switches, Filter cut-off switches, Output mode switch
Environmental    
CE Environmental Approvals European EMC Directive 2004/108/EC, Low Voltage directive 2006/95/EC

 

 

  • product logo
  • product logo
 Strain gauge signal conditioning for single or multiple strain gauge bridge sensors (load, force, pressure, torque), offering a wide bandwidth and a wide input signal range.

 

Documents

Software

No relevant software available

Product order options

Please read the following before selecting the options for this product:
SGA/A & SGA/D Strain Gauge Amplifier | Signal Conditioner has options for fitting in an IP65 ABS or to a DIN Rail Fixture

Options Code
18/24V DC 50-60Hz for connecting up to 4 transducers (min 350R each) in an ABS Case SGA/D
110/230V AC 50-60Hz for connecting up to 4 transducers (min 350R each) in an ABS Case SGA/A
Isolated DC PSU Module for SGA/D IS12/24
Accessories Code
DIN Rail for SGA cased D4

These are the following industries and applications in which this product has been used:

Digital Weighing Indicator for Panel Mounting

Digital Weighing Indicator for Panel Mounting

ADW15
Weighing Indicator and Controller Bulkhead Mounted

Weighing Indicator and Controller Bulkhead Mounted

SMW
Wireless Strain Gauge / Load Cell Acquisition

Wireless Strain Gauge / Load Cell Acquisition

T24-SA
LVDT Signal Conditioner and Amplifier

LVDT Signal Conditioner and Amplifier

LVDT
Q: Can the SGA be mounted on a DIN Rail?

A: Yes, the SGA can be mounted on a DIN Rail using a D4 base plate listed as an optional accessory for your SGA.

Q: Does the SGA have shunt calibration?

A: The SGA has an onboard shunt calibration function. This shunts one arm of the connected load cell to produce a known change in the output which can be used for calibration or checking load cell integrity (or associated wiring).

Q: Does the SGA / LVDT lose its calibration if you switch it from 4-20 mA to 0-10 V?

A: Yes 

For more 'Frequently Asked Questions' please see our Knowledge Centre

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