Strain Gauge, Bridge, Pressure Transducer, Load Cell Alarms, Amplifiers, and Transmitters

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

Applications


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 power options
  3. Request an API price list via chat
  4. 2-5 day typical lead time (USA customers)
  5. To place your order
Model Input/Output Features Product

Strain Gauge Input Alarm Trip


Factory Configured

APD 1500
APD 1520

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

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
  • 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

Strain Gauge, Bridge, Pressure Sensor, Load Cell to DC Isolated Signal Conditioner


Factory Configured

API 4051 G I

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

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
  • RepalcesAction 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 for 85-265 VAC, 60-300 VDC power
  • D option for 9-30 VDC power

Api 4051 GI
API 4051 GI

Strain Gauge, Bridge, Pressure Sensor, Load Cell to DC Isolated Signal Conditioner


Factory Configured

APD 4051

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

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

Strain Gauge, Bridge, Load Cell to DC Signal Conditioner
Non-Isolated


Field Selectable Minuteman Setup


API 4058 G

Open Datasheet
Download Datasheet
Email Datasheet Link
Field configurable Input
0-5 mVDC to 0-1200 mVDC

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
  • P option for 85-265 VAC, 60-300 VDC power
  • D option for 9-30 VDC power



Api 4058G
API 4058 G

Strain Gauge, Bridge, Load Cell to DC Signal Conditioner
Non-Isolated



Field Selectable Minuteman Setup


APD 4058

Open Datasheet
Download Datasheet
Email Datasheet Link
Field configurable
0-5 mVDC to 0-1200 mVDC

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

Strain Gauge, Bridge, Load Cell, Pressure Sensor to DC Signal Conditioner


Field Selectable Minuteman Setup


API 4059 G

Open Datasheet
Download Datasheet
Email Datasheet Link
Field configurable
0-5 mVDC to 0-400 mVDC, 120 mA

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
  • P option for 85-265 VAC, 60-300 VDC power
  • D option for 9-30 VDC power

Api 4059G
API 4059 G
Socket sold separately

Strain Gauge, Bridge, Load Cell, Pressure Sensor to DC Signal Conditioner


Field Selectable Minuteman Setup


APD 4059

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

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

Strain Gauge, Bridge, Load Cell, Pressure Sensor to DC Signal Conditioner

Calibration Resistor Option


Field Selectable Minuteman Setup


APD 4059CR

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

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
  • Lifetime warranty
  • 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 Signal Splitter
1 Strain Gauge Input to 2 DC Outputs


Factory Configured

APD 5393

Open Datasheet
Download Datasheet
Specify input range
Factory configured for one 350 Ω (or greater)
strain gauge, 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


Factory Configured

APD 2000 Series

Specify input range for each 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 / RS485 Modbus and Analog Output


Seneca Z-SG

Open Z-SG datasheet
Download Z-SG datasheet

Open Z-SG installation
Download Z-SG installation

Open Z-SG user manual
Download Z-SG usr manual

Open Z-SG calibration procedure
Download Z-SG calibration procedure

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 with backplane connector system

Open Z-SG application note
Download Z-SG application note

Download Z-SG DWG CAD file
Download Z-SG 3D STP CAD file
Download Z-SG LabView drivers

  • Only 17.5 mm wide
  • DIP switch configuration
  • Calibration via S117P1 or push button
  • 3-way isolation
  • Low cost
  • DIN rail mount without tools
  • Power: 10-40 VDC, 19-28 VAC

  CE logo 
Z-SG
Z-SG

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


Seneca S117P-1

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

Load Cell, Strain Gauge, Bridge Junction Box


Seneca SG-EQ4

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

Z-Series Backplane Connector


Seneca Z-PC-DINAL1-35

Open Z-PC-DINAL datasheet
Download Z-PC-DINAL datasheet

Open Z-PC-DIN overview
Download Z-PC-DIN overview
Head terminal + 1 slot 35mm DIN rail bus system
For Z-PC Line
Required for Modbus connection
DIN rail mount with screw terminals, 1 slot
Connect one Z-PC series module
Connect power
Connect Modbus
Z-PC-DINAL1-35
Z-PC-DINAL1-35

Z-Series Backplane Connector


Seneca Z-PC-DINAL2-17.5

Open Z-PC-Z-PC-DINAL datasheet
Download Z-PC-DINAL datasheet

Open Z-PC-DIN overview
Download Z-PC-DIN overview
Head terminal + 2 slot 35mm DIN rail bus system
For Z-PC Line
Required for Modbus connection
DIN rail mount with screw terminals, 2 slots
Connect one or two Z-PC series modules
Connect power
Connect Modbus
Z-PC-DINAL2-17.5
Z-PC-DINAL2-17.5

4 Digit 4-20 mA Loop Powered Display


Field Rangeable


S315
S315-IP66

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  new!
S315
S315