Strain Gauge Amplifier for Single or Multiple Strain Gauge Bridge Sensors (SGA A&D)
- Strain gauge amplifier ideal for load cell signal conditioning
- Bridge excitation of 10V DC with drive for 4 load cells
- Selectable bandwidth of 1 to 5000 Hz 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 (shown in main photo) comes complete with case, with option of DIN rail mounted case (D4) as shown on left or as pcb board
The SGA Strain Gauge Amplifier is a high performance signal conditioner for single or multiple strain gauge bridge sensors such as load, force, pressure and torque.
The SGA 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 4 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.
The SGA Strain Gauge Amplifier is supplied in a waterproof IP65 NEMA4 bulkhead mountable case and is available with AC or DC power supply options. Robust and fully CE compliant.
For a digital version with set point relays, communications and display options please see our Load Cell Amplifier Model LCA15.
| 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 | 9 | 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) | 2 | mA | ||
| Output load (Current output) | 0 | 500 | Ohms | |
| Bandwidth (No filter and > 2mV/V) - 3dB point | DC | 6 | kHz | |
| Filter cut-off (Switchable ranges) - 3dB point | 1 | 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 | |||
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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/Load Cell Amplifier/Signal Conditioner has options for fitting in an IP65 ABS or to a DIN Rail Fixture
| Options | Code |
|---|---|
| Strain Gauge Amplifier DC Powered | SGA/D |
| Strain Gauge Amplifier AC Powered | SGA/A |
| Isolated DC PSU Module for SGA/D | IS12/24 |
| Accessories | Code |
| DIN Rail Mounting for pcb DSJ1, SGA | D4 |
These are the following industries and applications in which this product has been used:
- Agriculture - Load Measurement in Pea Farming
- Alternative Energy - Signal Amplifier Use in Solar Energy Application
- Silo & Weighing Industry - Remote Silo Weighing
- Marine - Anchor Testing
- Food Industry - Load Measurement in Pea Farming
Digital Weighing Indicator for Panel Mounting
