Alarms, Amplifiers, and Transmitters for Strain Gauge, Bridge, Pressure Transducer or Sensor, Load Cell Applications
- 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 belowfor 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 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
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
- Select a model
- See data sheet for ordering info and options
- Note that options affect pricing
- Request a quote via chat or call us
- 2-5 day typical lead time + shipping time
- 5-10 day lead time for quantities of 5 or more + shipping time
- To place your order
- Call 800-942-0315 for credit card order
- Find your authorized representative
- Call us to find your local distributor
- Set up an account to use a purchase order
- Outside the USA?
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
APD 1500 from $319
APD 1520 from $339
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
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 1500, APD 1520
Isolated DC Amplifier for One Sensor:
- Load Cell
- Pressure Transducer or Sensor
- Strain Gauge
- Bridge
- Force Transducer or Sensor
API 4051 G I from $349
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
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
Isolated DC Amplifier for One Sensor:
- Load Cell
- Pressure Transducer or Sensor
- Strain Gauge
- Bridge
- Force Transducer or Sensor
APD 4051 from $349
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
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 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 $359
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
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 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 $369
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
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 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 $389
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
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 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 $409
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
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 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 $449
Open Datasheet
Download Datasheet
Email Datasheet Link
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
- 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 4059CR
IsoSplitter
®
Strain Gauge Amplifier/Signal Splitter
1 Strain Gauge Input to 2 Isolated DC Outputs
Factory Configured
APD 5393 from $539
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
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
APD 5393 Strain Gauge IsoSplitter
DuoPak ® 2 Channel Isolated Signal Conditioners
Choose Your Factory Configuration
APD 2000 Series from $569
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
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
APD 2000 Series Strain Gauge
Strain Gauge/Load Cell/Bridge Input / RS485 Modbus and Analog Output
Z-SG $250 *stock item*
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-series LabView drivers
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-series 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
Z-SG
Strain Gauge/Load Cell/Bridge Input
Modbus RTU and Analog Output
Advanced Features
Z-SG2 $260
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
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
Z-SG2
RS232/USB, TTL/USB, RS485/USB Isolated Serial Converter
Seneca S117P-1 $260 *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
T120
T121
Z-SG
Includes
Converter box
Software mini CD (or download latest)
Adapter cable
Converter box
Software mini CD (or download latest)
Adapter cable
S117P1
Load Cell, Strain Gauge, Bridge
Sum Board / Sum Box
SG-EQ4 $85
Board onlySG-EQ4-BOXPG7 $345
Board in boxOpen 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
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-BOXPG7
Z-Series Backplane Connector
Z-PC-DINAL1-35 $40
Open Z-PC-DINAL datasheet
Download Z-PC-DINAL 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
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
Connect one 17.5 or 35mm Z-PC series module
Z-PC-DINAL1-35
Z-Series Backplane Connector
Z-PC-DINAL2-17.5 $47.50 *stock item*
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 slots
For one or two 17.5mm wide Z-PC modules
Connect power
Connect Modbus
Required for Modbus connection
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
Connect one or two 17.5mm Z-PC series modules
Z-PC-DINAL2-17.5
Z-Series Backplane Extender
Z-PC-DIN2-17.5 $30 *stock item*
Open Z-PC-DIN2 datasheet
Download Z-PC-DIN2 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
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
Add one or two 17.5mm Z-PC series modules
Z-PC-DIN2-17.5
4 Digit 4-20 mA Loop Powered Display
Field Rangeable
S315 $139
*stock item*
S315-IP66 $300
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
Input: 4-20 mA
Display: 4 digit red LED
- 1/8 DIN panel mount or IP66 housing
- Scaleable 4 digit display
S315
