Load Cell Amplifier | Load Cell Signal Conditioner | SGA

High Speed, High-Performance Signal Conditioner, up to 4 Strain Gauge Bridges

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SGA Load Cell Amplifier

At a Glance

  • Input: 0.06mV/V to 30.3mV/V
  • Output: 0-5Vdc, 0-10Vdc, 4-20mA, 0-20mA, ±5Vdc or ±10Vdc
  • Environmental Protection: IP67
  • High Speed: Bandwidth 6kHz max.
  • Mains & 18-24Vdc Versions
  • Ideal for use in most Industrial Environments 
  • Dust Tight & Waterproof
  • AC or DC Versions Available to Suit Your Specific Application
  • Simple Setup – With Non-Interactive Span & Zero Controls
  • Let Us Save You Time – We can calibrate it with any of our strain gauge transducers


Applied Measurements SGA load cell amplifier / load cell signal conditioner is designed to provide a high stability, high speed, conditioned analogue output from up to four 350Ω strain gauge bridges connected in parallel.

The SGA load cell signal conditioner is capable of working with very low-level input signals right down to 0.06mV/V and amplifying them into a stable, high-level industry standard process signal such as 0-10Vdc or 4-20mA.

The high-speed load cell signal conditioner is housed in a rugged ABS enclosure rated to IP67 making it suitable for use in a wide range of industrial locations.

Other features of the load cell amplifier include straightforward configuration using non-interactive zero & span controls and variable low-pass filter to allow fine tuning for any application.

There are two versions of the load cell amplifier available: the SGA-A model which requires a 110 or 240Vac supply, and the SGA-D which operates from an 18-24Vdc supply.

The SGA load cell amplifier can be supplied fully-wired and calibrated with any strain gauge transducer from our wide range listed in the associated products section below.

Technical Specifications

Power supply (SGA/A) 50 - 60Hz99/198110/230126/253Vac
Power supply DC (SGA/A and SGA/D)1824Vdc (Note: 1)
Power supply IS12/24 - Isolated (optional)936Vdc
Power supply current DC :- (depends on loading)5090200mA
Bridge excitation (10V) 350R Strain Gauge9.751010.25Vdc
Bridge excitation (5V) 350R Strain Gauge4.8555.15Vdc
Bridge resistance85Ohms
Bridge sensitivity (Switchable)0.0630mV/V
Gain adjustment (Pot - fine adj.)0.061.0mV/V (Note: 2)
Offset adjustment (Pot - fine adj.)-1.25+1.25%FR (FR=Full Range)
Offset adjustment (Switchable - coarse adj)±1.25±80%FR
Output load (Voltage output)2mA
Output load (Current output)0500Ohms
Bandwidth (No filter and > 2mV/V) - 3dB pointDC6kHz
Filter cut-off (Switchable ranges) - 3dB point15000Hz
Zero temperature coefficient (@ 2.5mV/V)0.0020.009%FR/ ºC at 2.5mV/V FR
Span temperature coefficient0.0070.01%FR/ ºC
Gain stability -1st 1000 Hours0.2%FR
Gain stability - 2nd 1000 Hours0.1%FR
90 day Offset stability3.3uV
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-1050ºC
Storage temperature range-2070ºC
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
ConnectionsField screw terminals - 2.5mm² rising clamp
EnclosureABS case 164 x 84 x 55 sealed to IP65 fitted with 3 off cable glands
ControlsGain pot, Offset pot, Coarse gain switches, Coarse offset switches, Filter cut-off switches, Output mode switch
CE Environmental ApprovalsEuropean EMC Directive 2004/108/EC, Low Voltage directive 2006/95/EC

Product Dimensions

SGA Load Cell Signal Conditioner Outline Drawing

Ordering Codes & Options

Core ProductSupply VoltageExample Result
SGA99-120/198-253Vac (in ABS case)SGA/A
SGA18-28Vdc (in ABS case)SGA/D
SGA18-28Vdc (PCB only)SGAPCB/D
D4DIN Rail Mounts for SGA CaseD4
IS1224Isolated 9-32Vdc PSU for SGA/DIS1224
SGABCM¼ & ½ Bridge Completion ModuleSGABCM

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