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

  • 6 Year 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
Amplifiers for
  • Load Cells and Stain Gauges
  • Weighing Systems
  • Pressure Transducers and Sensors
  • Wheatstone Bridges
  • Force Transducers and Sensors


Click on PDF links below
for product information
Links
Product brochure
Options & accessories
Regulatory compliance

Reference Info
Troubleshooting strain gauge sensors
LoopTracker and Output Test
Sink vs source

Application Notes
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 select your product
  • Open pdf datasheet for your model
  • Select model, range, units, options, accessories
  • Contact us if you need assistance
Need a quote?
Ready to order?
Other ways to order
Model Input/Output Features Product

Alarm Trip for 1 to 4 Sensors:

  • Load Cell
  • Pressure Transducer or Sensor
  • Strain Gauge
  • Bridge
  • Force Transducer or Sensor
Factory Configured

APD 1500  from $379
APD 1520  from $399

Open Datasheet
Download Datasheet
Specify
Strain gauge mV/V rating, mV range,
Excitation voltage
Factory configured
100 Ω to 10000 Ω strain gauge
5 mV to 2000 mV
1-10 VDC excitation
Accepts one sensor for input

APD 1500 Single Alarm Trip
Dual SPDT contact sets
Standard: HI alarm, non-latching, normal acting
See data sheet for alarm options

APD 1520 Dual Alarm Trip
2 independent SPDT contact sets
Standard: HI/LO alarms,
non-latching, normal acting
See data sheet for alarm options

  • User adjustable setpoint(s)
  • User adjustable deadband(s)
  • 8 Amp SPDT contacts
  • Input LoopTracker LED
  • Alarm status LEDs
  • Alarm options: LO, HI/HI, LO/LO, band alarm
  • Optional reverse acting
  • Optional latching alarms
  • Push to test/reset
  • Remote push to test/reset
  • Full I/O/power isolation
  • Removable plugs
  • DIN rail mount without tools
  • Universal power 85-265 VAC, 60-300 VDC
  • D option for 9-30 VDC, 10-32 VAC power

APD 1500UL approved
APD 1500, APD 1520

Isolated DC Amplifier for One Sensor:

  • Load Cell
  • Pressure Transducer or Sensor
  • Strain Gauge
  • Bridge
  • Force Transducer or Sensor
Factory Configured

API 4051 G I  from $359

Open Datasheet
Download Datasheet
Specify input range
Factory configured
One 350 Ω stain gauge, load cell or bridge sensor
1 mV to 2000 mV
Accepts one sensor for input

Specify excitation voltage
4 to 10 VDC

Specify output range
Factory configured
0-1 V to 0-10 V
±1 V to ±10 V
0-1 mA to 0-20 mA, 4-20 mA

  • LoopTracker LEDs for input and output
  • Full I/O/power isolation
  • ReplacesAction AP 4051
  • Internal bridge excitation source
  • Output test button
  • Uses API-011 11-pin socket
  • 115 VAC powered
  • A230 option for 230 VAC
  • P option: 85-265 VAC, 60-300 VDC power (+$60)
  • D option: 9-30 VDC power (+$60)

Api 4051 GI
API 4051 GI

Isolated DC Amplifier for One Sensor:

  • Load Cell
  • Pressure Transducer or Sensor
  • Strain Gauge
  • Bridge
  • Force Transducer or Sensor
Factory Configured

APD 4051  from $389

Open Datasheet
Download Datasheet
Specify input range
Factory Configured
One 350 Ω stain gauge, load cell or bridge sensor
1 mV to 2000 mV
Accepts one sensor for input

Specify excitation voltage
Factory Configured
4 to 10 VDC, 30 mA max.

Specify output range
Factory Configured
0-1 V to 0-10 V
±1 V to ±10 V
0-1 mA to 0-20 mA, 4-20 mA

  • I/O LoopTracker LEDs
  • Full I/O/power isolation
  • 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 4051UL approved
APD 4051

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 $379

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: 9-30 VDC power (+$60)



Api 4058G
API 4058 G

Non-Isolated DC Amplifier for 1 Sensor

  • Load Cell
  • Pressure Transducer
  • Strain Gauge
  • Bridge
  • Force Transducer

Field Selectable Minuteman Setup


APD 4058  from $429

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

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

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 sensor
  • 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

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 4059 G  from $459

Open Datasheet
Download Datasheet
Email Datasheet Link
Field configurable
0-5 mVDC to 0-400 mVDC, 120 mA
Accepts one to four sensors for input

Field settable excitation voltage
0-10 VDC in 1 VDC steps

18 field configurable outputs
0-1 V to ±10 V
0-2 mA to 0-20 mA, 4-20 mA
Zero Offset (Tare) ±100% of span in 15% increments
  • Minuteman one-minute setup
  • I/O LoopTracker LEDs
  • Full I/O/power isolation
  • Internal Bridge Excitation Source
  • Drive up to 4 bridges
  • Output test button
  • Uses API-011 11-pin socket
  • 115 VAC powered
  • A230 option for 230 VAC
  • D option: 9-30 VDC power (+$60)

Api 4059G
API 4059 G
Socket sold separately

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 4059  from $469

Open Datasheet
Download Datasheet
Email Datasheet Link
Field configurable
0-5 mVDC to 0-400 mVDC

Field settable excitation voltage
0-10 VDC in 1 VDC steps, 120 mA
Accepts one to four sensors for input

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
  • Full I/O/power isolation
  • Internal bridge excitation source
  • Drive up to 4 bridges
  • 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 4059UL approved
APD 4059

Isolated DC Amplifier for 1 to 4 Sensors with
Calibration Resistor Option for:

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

Field Selectable Minuteman Setup


APD 4059CR  from $499

Open Datasheet
Download Datasheet
Email Datasheet Link
apd4059cr Field configurable input
0-5 mVDC to 0-400 mVDC

Field settable excitation voltage
0-10 VDC in 1 VDC steps, 120 mA
Use internal or external calibration resistor
Specify calibration resistor value if required
Accepts one to four sensors for input

18 field configurable outputs
0-1 V to ±10 V
0-2 mA to 0-20 mA, 4-20 mA
Zero Offset (Tare) ±100% of span in 15% increments
  • Minuteman one-minute setup
  • I/O LoopTracker LEDs
  • Full I/O/power isolation
  • Internal bridge excitation source
  • Drive up to 4 bridges
  • Calibrations switch
  • 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 4059UL approved
APD 4059CR

IsoSplitter® Strain Gauge Amplifier/Signal Splitter
1 Strain Gauge Input to 2 Isolated DC Outputs


Factory Configured

APD 5393  from $589

Open Datasheet
Download Datasheet
Specify input range
Factory configured for one 350 Ω (or greater)
strain gauge, pressure transducer, pressure sensor, load cell, or bridge
Strain gauge mV range: 1 mV to 2000 mV
Specify mV/V or mV range
mV/V sensitivity X excitation voltage = total mV range

Specify excitation voltage
4 to 10 VDC excitation at 30 mA

Specify output range for each channel
2 independent channels
0-1 V to 0-20 V
±1 V to ±10 V
0-1 mA to 0-25 mA, 4-20 mA
  • One strain gauge input
  • Two independent DC output channels
  • I/O LoopTracker LEDs
  • Selectable sink/source mA output
  • 20 V output loop power supplies
  • Output test buttons
  • Full I/O/power isolation
  • Removable plugs
  • DIN rail mount
  • 45 mm wide
  • Universal power 85-265 VAC, 60-300 VDC
  • D for 9-30 VDC, 10-32 VAC power

Strain Gauge IsoSplitterUL approved
APD 5393 Strain Gauge IsoSplitter

DuoPak® 2 Channel Isolated Signal Conditioners


Choose Your Factory Configuration

APD 2000 Series  from $629

Specify input range for each channel
Accepts one sensor for each input channel

APD 2005 Ch1: DC mV/V/mA Ch2: Strain gauge
APD 2015 Ch1: RTD Ch2: Strain gauge
APD 2035 Ch1: Potentiometer Ch2: Strain gauge
APD 2055 Ch1: Strain gauge Ch2: Strain gauge
APD 2056 Ch1: Strain gauge Ch2: AC mV/V/mA
APD 2057 Ch1: Strain gauge Ch2: Frequency

Specify output range for each channel
2 independent channels
0-1 V to 0-20 V
±1 V to ±10 V
0-1 mA to 0-25 mA, 4-20 mA
  • Optional I/O reversal
  • I/O LoopTracker LEDs
  • Selectable sink/source mA output
  • 20 V output loop power supplies
  • Output test buttons
  • Full I/O/power isolation
  • Removable plugs
  • DIN rail mount
  • 45 mm wide
  • Universal power 85-265 VAC, 60-300 VDC
  • D for 9-30 VDC, 10-32 VAC power

DuoPakUL approved
APD 2000 Series Strain Gauge

Strain Gauge/Load Cell/Bridge Input
Modbus RTU and Analog Output
Advanced Features


Z-SG2  $270

Open Z-SG/Z-SG2 datasheet
Download Z-SG/Z-SG2 datasheet

Open Z-SG/Z-SG2 installation
Download Z-SG/Z-SG2 installation

Open Z-SG2 user manual
Download Z-SG2 user manual

Field Configurable Input
Input: One input channel connection for up to 4 (350 Ω) or
8 (1000 Ω) strain gauge load cells
4 or 6 wire
Excitation supply
Sensitivity: 1 to 64 mV/V
Switch I/O for either tare or alarm

Field Configurable Output
Output: 4-20 mA, 0-20 mA
0-5 V, 0-10 V

Modbus RTU requires backplane connector system
Configure with EASY SETUP software and standard micro-USB cable
0.01% FS accuracy class
24 bit analog-digital conversion
Upgradeable firmware
Settable sampling rate
Alarm with programmable hysteresis
Configurable resolution
Settable floating-point value
Stabilized measurement with noise filter

Download EASY SETUP software
Download Z-series LabView drivers
Download Z-SG2 DWG CAD file
Download Z-SG2 3D STP CAD file

  • Only 17.5 mm wide
  • EASY SETUP software and DIP switch configuration
  • Calibration via software or push button
  • 3-way isolation
  • Low cost
  • DIN rail mount without tools
  • Power: 10-40 VDC, 19-28 VAC

  CE logo 
Z-SG2
Z-SG2

Strain Gauge/Load Cell/Bridge Input
Modbus RTU and Analog Output
Advanced Features


Z-SG3  $300

Open Seneca Stain Gauge Module Brochure
Download Open Seneca Stain Gauge Module Brochure

Open Z-SG3 installation manual
Download Z-Z-SG3 installation manual

Open Z-SG3 user manual
Download Z-SG3 user manual

Field Configurable Input
Input: One input channel connection for up to 4 (350 Ω) or
8 (1000 Ω) strain gauge load cells, 87 Ω minimum impedance
4 or 6 wire
Use SG-EQ4 for easy wiring of mutiple load cells
Excitation supply
Sensitivity: 1 to 64 mV/V
Switch I/O for either tare or alarm

Field Configurable Output
Output: 4-20 mA, 0-20 mA
0-5 V, 0-10 V

Modbus RTU
Configure with EASY SETUP software and standard micro-USB cable
0.01% FS accuracy class
24 bit analog-digital conversion
Upgradeable firmware
Settable sampling rate
Alarm with programmable hysteresis
Configurable resolution
Settable floating-point value
Stabilized measurement with noise filter

Download EASY SETUP software
Download Z-series LabView drivers
Download Z-SG3 3D STP CAD file

  • Only 17.5 mm wide
  • EASY SETUP software and DIP switch configuration
  • Calibration via software or push button
  • 5-way isolation
  • DIN rail mount without tools
  • Power: 10-40 VDC, 19-28 VAC

  CE logo 
Z-SG3
Z-SG3

RS232/USB, TTL/USB, RS485/USB Isolated Serial Converter


Seneca S117P-1  $299 *stock item*

Open S117P-1 datasheet
Download S117P-1 datasheet

Open S117P-1 installation
Download S117P-1 installation

S117P-1 Software

Download S117P-1 Software

Programming kit for
T120
T121
Z-SG
Includes
Converter box
Software mini CD (or download latest)
Adapter cable
s117p1
S117P1

Load Cell, Strain Gauge, Bridge
Sum Board / Sum Box


SG-EQ4  $85
Board only

SG-EQ4-BOXPG7  $340
Board in box

Open SG-EQ4 instructions
Download SG-EQ4 instructions

Open SG-EQ4 installation
Download SG-EQ4 installation
Input
Up to 4 strain gauges

Output
Summed signal from up to 4 strain gauges
  • Connect up to 4 strain gauges
  • For 4-wire / 6-wire load cells
  • Internal jumpers for configuration
  • Trim pots for equalized 4 wire signal
sg-eq4
SG-EQ4
sg-eq4
SG-EQ4-BOXPG7

Z-Series Backplane Connector


Z-PC-DINAL1-35  $40

Open Z-PC-DIN datasheet
Download Z-PC-DIN datasheet

Open Z-PC-DIN overview
Download Z-PC-DIN overview
Head terminal + 1 slot
For one 17.5mm or one 35mm wide Z-PC module
Connect power
Connect Modbus
Required for Modbus connection

DIN rail mount with screw terminals, 1 slot
Connect one 17.5 or 35mm Z-PC series module
Z-PC-DINAL1-35
Z-PC-DINAL1-35

Z-Series Backplane Connector


Z-PC-DINAL2-17.5  $45 *stock item*

Open Z-PC-Z-PC-DIN datasheet
Download Z-PC-DIN datasheet

Open Z-PC-DIN overview
Download Z-PC-DIN overview
Head terminal + 2 slots
For one or two 17.5mm wide Z-PC modules
Connect power
Connect Modbus
Required for Modbus connection

DIN rail mount with screw terminals, 2 slots
Connect one or two 17.5mm Z-PC series modules
Z-PC-DINAL2-17.5
Z-PC-DINAL2-17.5

Z-Series Backplane Extender


Z-PC-DIN2-17.5  $45 *stock item*

Open Z-PC-DIN datasheet
Download Z-PC-DIN datasheet

Open Z-PC-DIN overview
Download Z-PC-DIN overview
2 slot extension terminal
For one or two 17.5mm wide Z-PC modules
Connect power
Connect Modbus
Required for Modbus connection
DIN rail mount with 2 slots
Add one or two 17.5mm Z-PC series modules
Z-PC-DIN2-17.5.jpg
Z-PC-DIN2-17.5

4 Digit 4-20 mA Loop Powered Display


Field Rangeable


S315  $150 *stock item*
S315-IP66  $310

Open Datasheet
Download Datasheet

Open Installation Manual
Download Installation Manual

Click to see ALL Seneca products

Loop Powered Display
Input: 4-20 mA
Display: 4 digit red LED

  • 1/8 DIN panel mount or IP66 housing
  • Scaleable 4 digit display

CE logo
S315
S315