Alarms, Amplifiers, and Transmitters for Strain Gauge, Bridge, Pressure Transducer or Sensor, Load Cell Applications

lifetime warranty
  • Lifetime Warranty on API Modules
  • LoopTracker® I/O LEDs
  • Hot-Swappable Plug-In Design
  • Zero and Span Xmtr Output Calibration
  • Push to Test Output
  • Full I/O/Power Isolation
Click on PDF links below
for product information

Literature and Links


API product brochure
Options & accessories
Regulatory Compliance page

Reference Info


Troubleshooting strain gauge sensors
LoopTracker and Output Test
Sink vs source
Alarm terminology
Deadband
Relay protection & EMI suppression

UL Approvals

API modules USA
API modules Canada

APD modules USA
APD modules Canada

Amplifiers for

  • Load Cells
  • Weighing Systems
  • Pressure Transducers and Sensors
  • Strain Gauges
  • Wheatstone Bridges
  • Force Transducers and Sensors

Application Notes


Chemical plant
Platform scale
Truck scale
Dispensing system automation
6-Wire strain gauges
Pressure sensor vs. pressure transmitter
Pressure transducer calibration
Weighing shipping containers
Pressure system calibration
Pressure transducer calibration
Plastic extruder pressure
Extrudung guitar strings
Custom product for high speed pill presses

How to Order

  1. Select a model
  2. See data sheet for ordering info and options
  3. Note that options affect pricing
  4. Request a quote via chat or call us
  5. 2-5 day typical lead time + shipping time
  6. 5-10 day lead time for quantities of 5 or more + shipping time
  7. To place your order
Model Input/Output Features Product

Non-Isolated DC Amplifier for 1 to 4 Sensors:

  • Load Cells
  • Pressure Transducers and Sensors
  • Strain Gauges
  • Bridges
  • Force Transducers and Sensors

Field Selectable Minuteman Setup


API 4058 G  from $329

Open Datasheet
Download Datasheet
Email Datasheet Link
Field configurable Input
0-5 mVDC to 0-1200 mVDC
Accepts one to four sensors for input

Field settable excitation voltage
0-10 VDC in 1 VDC steps, 115 mA max.

18 Field configurable outputs
0-1 V to ±10 V
0-2 mA to 0-20 mA, 4-20 mA
  • Minuteman one-minute setup
  • I/O LoopTracker LEDs
  • Internal bridge excitation source
  • Drive one bridge
  • Output test button
  • Uses API-011 11-pin socket
  • 115 VAC powered
  • A230 option for 230 VAC
  • D option for 9-30 VDC power



Api 4058G
API 4058 G

Non-Isolated DC Amplifier for 1 to 4 Sensors:

  • Load Cells
  • Pressure Transducers and Sensors
  • Strain Gauges
  • Bridges
  • Force Transducers and Sensors

Field Selectable Minuteman Setup


APD 4058  from $339

Open Datasheet
Download Datasheet
Email Datasheet Link
Field configurable
0-5 mVDC to 0-1200 mVDC
Accepts one to four sensors for input

Field settable excitation voltage
0-10 VDC in 1 VDC steps, 30 mA

18 Field configurable outputs
0-1 V to ±10 V
0-2 mA to 0-20 mA, 4-20 mA

  • Minuteman one minute setup
  • I/O LoopTracker LEDs
  • Non-isolated
  • Internal bridge excitation source
  • Drive one bridge
  • Output test button
  • DIN rail mount
  • 22.5 mm wide
  • Universal power 85-265 VAC, 60-300 VDC
  • Option D for 9-30 VDC, 10-32 VAC power

APD 4058UL approved
APD 4058