Temperature Alarms and Transmitters

lifetime warranty
  • Lifetime Warranty on API Modules
  • LoopTracker® LEDs
  • Hot-Swappable Plug-In Design
  • 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
Cross reference
Regulatory Compliance page

UL Approvals

API modules USA
API modules Canada

APD modules USA
APD modules Canada

Reference Info


Thermocouple types
What is a Ground loop?
Installation FAQs
RFI/EMI
LoopTracker and Output Test
Sink or source

Applications


Monitor stack flare
Oven overtemp shutdown
Monitor chillers and freezers

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

Thermocouple Input Alarm Trips


Factory Configured

New Versions 12-11-2018
API 1200 G  from $279
API 1220 G  from $299

Open Datasheet
Download Datasheet

Old Version
API 1200 G (discontinued)
API 1220 G (a few left)

Open Datasheet
Download Datasheet
Specify T/C type and
°F or °C temperature range

Factory configured
Thermocouple J, K, T, E, R, S, N, B, C, D, G, M, P
100°F (55°C) recommended minimum span

API 1200 G Single Alarm Trip
One DPDT contact set
Standard: HI alarm, normal acting,
set/reset adjustments, non-latching
See data sheet for alarm options

API 1220 G Dual Alarm Trip
Two SPDT contact sets
Standard: HI/LO alarms, normal acting,
two set/reset adjustments, non-latching
See data sheet for alarm options

  • New version
    • Complete thermocouple selection
    • Microprocessor controlled input linearization
    • More burnout options
    • Improved setpoint/reset point control
  • User adjustable set and reset point(s)
  • 8 Amp contacts
  • Hot-swappable plug-in design
  • Replaces Action AP 1200 and AP 1220
  • Input LoopTracker LED and output test button
  • Alarm status LEDs
  • Alarm options: LO, HI/HI, LO/LO
  • Optional reverse acting, optional latching
  • 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 1200G
API 1200 G, API 1220 G

Universal Temperature Input to DC Isolated Transmitter


Field Programmable


APD 4000  from $375

Open Feature Summary
Download Feature Summary

Open Datasheet
Download Datasheet
Field programmable inputs
Thermocouples: J, K, T, E, R, S, N, B, C, D, G, M, P
RTDs: 2, 3, or 4 wire, 10Ω to 8000Ω RTDs
Thermistors: 44000 series, YSI 400, Spectrum
Custom input available

18 field selectable output ranges
Voltage: 0-1V, 0-2V, 0-4V, 0-5V, 1-5V, 0-8V, 0-10V, 2-10V,
±5V, ±10V
Current: 0-2mA, 0-4mA, 0-8mA, 0-10mA, 2-10mA, 0-16mA,
0-20mA, 4-20mA
Can be wired for sink or source
  • Covers all common temperature sensors
  • Removable plugs
  • Input LoopTracker LED
  • Output test button
  • Full I/O/power isolation
  • Selectable output sink/source
  • 20 V output loop power supply
  • Universal power 85-265 VAC, 60-300 VDC
  • D option for 9-30 VDC, 10-32 VAC power
  • For orders of 5 or more, call us for lead times

APD4000 UL approved
APD 4000

Universal Input to DC Isolated Signal Conditioner


Field Programmable


APD 8000  from $399

Open Feature Summary
Download Feature Summary

Open Datasheet
Download Datasheet
Field configurable inputs
DC volts: 35 ranges from ±25mVDC to ±10 VDC
DC mA sinking input, 20 ranges from ±0.5mADC to ±20mADC
Potentiometer: 100Ω min. to 1 MegaΩ max.
Thermocouple: J, K, T, E, R, S, N, B, C, D, G, M, P
RTDs: 2, 3, or 4 wire, 10Ω to 8000Ω RTDs
Thermistor: 44000 series, YSI 400, Spectrum
Custom input available

18 field programmable output ranges
Voltage: 0-1V, 0-2V, 0-4V, 0-5V, 1-5V, 0-8V, 0-10V, 2-10V,
±5V, ±10V
Current: 0-2mA, 0-4mA, 0-8mA, 0-10mA, 2-10mA, 0-16mA,
0-20mA, 4-20mA
Can be wired for sink or source
  • Switch and pushbutton setup
  • Removable plugs
  • Input LoopTracker LED
  • Output test button
  • Full I/O/power isolation
  • Selectable output sink/source
  • 20 V output loop power supply
  • Universal power 85-265 VAC, 60-300 VDC
  • D option for 9-30 VDC, 10-32 VAC power
  • For orders of 5 or more, call us for lead times

APD8000 UL approved new!
APD 8000

Thermocouple to DC Isolated Transmitter


Factory Configured

APD 4130  from $375

Open Datasheet
Download Datasheet
Factory set input range
Thermocouple: J, K, T, E, R, S, N, B, C, D, G, M, P
Custom input available

Factrory set output range
Voltage: 0-1 V to 0-10 V, ±5 V, ±10 V
Current: 0-2 mA to 4-20 mA
Can be wired for sink or source
  • ±0.25 % accuracy
  • Removable plugs
  • Input LoopTracker LED
  • Output test button
  • Full I/O/power isolation
  • Selectable output sink/source
  • 20 V output loop power supply
  • Universal power 85-265 VAC, 60-300 VDC
  • D option for 9-30 VDC, 10-32 VAC power

APD4130 UL approvednew!
APD 4130

Thermocouple to DC Isolated Transmitter
High Accuracy


Factory Configured

APD 4131  from $395

Open Datasheet
Download Datasheet
Factory set input range
Thermocouple: J, K, T, E, R, S, N, B, C, D, G, M, P
Custom input available

Factrory set output range
Voltage: 0-1 V to 0-10 V, ±5 V, ±10 V
Current: 0-2 mA to 4-20 mA
Can be wired for sink or source
  • ±0.1 °C Accuracy
  • Removable plugs
  • Input LoopTracker LED
  • Output test button
  • Full I/O/power isolation
  • Selectable output sink/source
  • 20 V output loop power supply
  • Universal power 85-265 VAC, 60-300 VDC
  • D option for 9-30 VDC, 10-32 VAC power

APD4131 UL approvednew!
APD 4131

Universal Thermocouple to DC Isolated Transmitter


Field Programmable


APD 4351  from $395

Open Datasheet
Download Datasheet
Field programmable input
Thermocouple: J, K, T, E, R, S, N, B, C, D, G, M, P
Custom input available

18 field selectable output ranges
Voltage: 0-1V, 0-2V, 0-4V, 0-5V, 1-5V, 0-8V, 0-10V, 2-10V,
±5V, ±10V
Current: 0-2mA, 0-4mA, 0-8mA, 0-10mA, 2-10mA, 0-16mA,
0-20mA, 4-20mA
Can be wired for sink or source
  • Covers all common thermocouples
  • Removable plugs
  • Input LoopTracker LED
  • Output test button
  • Full I/O/power isolation
  • Selectable output sink/source
  • 20 V output loop power supply
  • Universal power 85-265 VAC, 60-300 VDC
  • D option for 9-30 VDC, 10-32 VAC power
  • For orders of 5 or more, call us for lead times

APD4351 UL approvedNew!
APD 4351

Thermocouple to DC Isolated Signal Conditioner


Factory Configured

API 4130 GL  from $399

Open Feature Summary
Download Feature Summary

Open Datasheet
Download Datasheet

API 4130 GL sold before 07-12-16

Open Datasheet
Download Datasheet
Specify T/C type and
°F or °C temperature range

Factory configured
Thermocouples J, K, T, E, R, S, N, B, C, D, G, M, P
±0.25°C Accuracy
New microprocessor-based linearization

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

  • Hot-swappable plug-in design
  • Isolated & linearized
  • Automatic cold junction compensation
  • Full I/O/power isolation
  • Repalces Action AP 4130
  • I/O LoopTracker LEDs
  • Output test button
  • Uses API-008 8-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 4130GLNew! UL listed
API 4310 GL

Thermocouple Splitter / Converter


Factory Configured

TCS726  call for quote

Open Datasheet
Download Datasheet
Specify input type and range
Thermocouple type
Temperature range in F or C
Upscale or downscale burnout

Specify output types and ranges
Channel 1
4-20mA, 0-20mA, 0-5V, 1-5V, 0-10V or
Thermocouple type and range in F or C

Channel 2
Thermocouple type and range in F or C

Alarm option
Custom response time
  • Split a thermocouple into 2 outputs
  • Convert a thermocouple into a different thermocouple and a process output
  • Convert a thermocouple into 2 different thermocouples
  • Front zero and span pots
  • Output level LED
  • Full I/O/power isolation
  • Universal power options: 10 VDC to 280 VAC
Typical applications include
  • Interfacing legacy equipment with a PLC
  • Correcting thermocouple incompatibility issues
  • Monitoring and recording functions with one thermocouple
TCS726
TCS726

Process Signal to Bi-Polar DC Signal Converter


Factory Configured

BSC133  call for quote

BSC133 Data Sheet

BSC133 Input Option Data Sheets
RTD, mV, T/C
ACV, ACA, resistance, pH/Orp
Frequency, DC pulse, floating differential
Adder/subtractor
LVDT
Bipolar 3-wire potentiometer

BSC133 Output Option Data Sheets
High output drive
External ratio adjustment
Ramp, aux. DC supply
Peak hold, track & hold

Specify input type and range
AC/DC current/millivolt/volts
pH/ORP
RTD
Thermocouple
Frequency to 5kHz
Pulse input from proximity sensor
LVDT
Potentiometer or resistance

Specify output type and range
Bi-polar volts; ±1V to ±20V
Bi-polar mA; ±1mA to ±20mA
Output Options
  • Output ramp
  • External ratio 0.5 - 1.5
  • High current output
  • Auxiliary supply 24VDC/25mA max
  • External bipolar supply
  • Peak hold (max. hold 120 min)
  • Track and hold (max. hold 120 min)
  • Load independent bi-polar output
  • High power output & dither options for hydraulic applications
  • Adder or subtractor options
  • Output ramp, external ratio peak hold and track & hold options
  • Sensor excitation
  • Full I/O/power isolation
  • Universal power options: 8 VDC to 280 VAC
Typical applications include
  • Signal conversion
  • Hydraulic drive and solenoid actuation
BSC133
BSC133

Analog To Resistance Converter


Factory Configured

ATR167  call for quote

Open Datasheet
Download Datasheet
Specify input type and range
RTD
Thermocouple
Frequency to 5kHz
Pulse input from proximity sensor
Millivolt/Volts
Potentiometer or resistance

Specify output range
Potentiometer: 1k, 2k, 5k, 10k, 20k, 50k, 100k, 200k, custom
  • High resolution true analog output
  • 3-wire pot or 2-wire variable resistor output simulation
  • Front zero and span pots
  • Output level LED
  • Full I/O/power isolation
  • Universal power options: 8 VDC to 280 VAC
Typical applications include
  • Convert a thermocouple to RTD signal to match dissimilar existing equipment
  • Automatic gain control
ATR167
ATR167

Analog To Potentiometer Converter


Factory Configured

ATP 168  call for quote

Open Datasheet
Download Datasheet
Specify input type and range
RTD
Thermocouple
Frequency to 5kHz
Pulse input from proximity sensor
Millivolt/Volts
Potentiometer or resistance

Specify output range
Potentiometer: 1k, 2k, 5k, 10k, 20k, 50k, 100k, 200k, custom
  • Convert a signal to a potentiometer output
  • 3-wire pot or 2-wire variable resistor output simulation
  • 8 bit output resolution (255 count)
  • Front zero and span pots
  • Output level LED
  • Full I/O/power isolation
  • Universal power options: 8 VDC to 280 VAC
Typical applications include
  • Replace mechanical pot used for control of existing machinery
  • Automatic control of instrumentation gain or offset
  • Provide programmable adjustment for delays, filters or time constants.
ATP168
ATP168

Universal Input to 4-20 mA Loop Powered Transmitter


Field Programmable


K121  $149 *in stock*

Open Datasheet
Download Datasheet

Open Installation Manual
Download Installation Manual

Click to see ALL Seneca products

Field Programmable Input
Input: –150 mV to +150 mV
–30 V to +30V
–24 mA to 24 mA
RTD: Pt100, Pt500, Pt1000, Ni100
Thermocouple: J, K, T, E, R, S, B, N
Potentiometer: 500 Ω to 10 KΩ
Resistance: 1750 Ω

Output: 4-20 mA loop powered
Powered by the output loop

  • Only 6.2 mm wide
  • PC programmable configuration
  • Full 2-way isolation
  • Low cost
  • DIN rail mount without tools
  • Powered by 4-20 mA loop

  • CE logo  new  EX
K121
K121

Thermocouple to DC Isolated Transmitter


Field Configurable


K109TC  $169 *in stock*

Open Datasheet
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Open Installation Manual
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Field Configurable Input
Input: Thermocouple: J, K, T, E, R, S, N, B

Field Configurable Output
Output: 4-20 mA, 0-20 mA, 20-4 mA, 20-0 mA,
0-5 V, 1-5 V, 0-10 V, 10-0 V

  • Only 6.2 mm wide
  • DIP switch configuration
  • Full 3-way isolation
  • Low cost
  • DIN rail mount without tools
  • Power: 19.2-30 VDC or K-SUPPLY+KBUS

UL Listed   CE logo 
K109TC
K109TC

Universal Temperature to DC Isloated Transmitter


Field Programmable


Sineax V624

Open Datasheet
Download Datasheet

Open Installation Manual
Download Installation Manual

Download Software
T/C types
J, K, T, E, R, S, N, B, W5, W3, L, U
RTD, 2-, 3-, or 4-wire
100 Ω 0.00385α
100 Ω 0.003916α
Thermistor
Software for custom input linearization

Specify if Current or Voltage Output
0-2 mA to 0-20 mA, 20-0 mA
0-1 V to 0-10 V, 10-0 V

  • PC Programmable
  • Reverse Output Programmable
  • Custom Input Linearization
  • Programmable Sensor Fault Response
  • Removable Plugs
  • 3.7 kV Input/Output/Power Isolation
  • 24-60 or 85-230 VAC/VDC Powered
  • 3 Year Warranty

CE
Sineax V624

Head-Mount Universal Transmitter, Isolated


Field Programmable


Fits DIN Form B Heads

T121  $159 *in stock*

Open Datasheet
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Open Installation Manual
Download Installation Manual

Click to see ALL Seneca products

Programmable
Input: Pt100 or Ni100, Pt500, Pt1000
J, K, R, S, T, B, E, N
Potentiometer
mVDC, VDC

Selectable Output
Output: 4-20 mA, 20-4 mA

  • Order T121-C for pre-programmed I/O
  • 44 mm dia
  • EASY-USB configuration
  • I/O isolation
  • Low cost
  • DIN B with 5.8mm (0.228"dia) center hole
  • Power: 7 to 30 VDC current loop

T121   CE logo  new

T121

USB - UART TTL Converter


EASY-USB  $109
*in stock*
Open Datasheet
Download Datasheet

Open Installation Manual
Download Installation Manual

EASY-USB Software Link

Programming kitK121
K121

Includes
Converter
Software mini CD (or download latest)
Adapter cable (std USB cable not included)
EASY-USB
EASY-USB

4 Digit 4-20 mA Loop Powered Display


Field Rangeable


S315  $139 *in stock*
S315-IP66  $300

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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