Temperature Alarms and Transmitters

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

UL Approvals

API modules USA
API modules Canada

APD modules USA
APD modules Canada

Reference Info


Sink or Source
LoopTracker and Output Test
Signal Conditioner Terminology
Industry Terminology
RFI & EMI
Ohm's Law
What is a Ground Loop?
Installation FAQs

Applications


Dam Bubbler
Measure Heat Exchanger Δ Temperature
Control Heat Exchanger Δ Temperature
Chiller Temperature
Bearing Temperature
Motor Temperature
Motor Overheating
Motor Bearings

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

RTD Input Alarm Trips


Factory Configured

APD 1400
APD 1420

Open Datasheet
Download Datasheet
Specify RTD type and temperature range
Factory configured
10 Ω to 2000 Ω RTD including
100 Ω: 0.00385α, 0.00391α,
10 Ω Cu, 1000 Ω Ni-Fe,
120 Ω Ni or Special

APD 1400 Single Alarm Trip
Dual SPDT contact sets
Standard: HI alarm, non-latching, normal acting
See data sheet for alarm options

APD 1420 Dual Alarm Trip
2 independent SPDT contact sets
Standard: HI/LO alarms, non-latching, normal acting
See data sheet for alarm options

  • 2-wire or 3-wire RTD
  • Lead wire compensation for 3-wire
  • 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 1400UL approved
APD 1400, APD 1420

RTD Input Alarm Trips


Factory Configured

API 1400 G
API 1420 G

Open Datasheet
Download Datasheet
Specify RTD type and temperature range
Factory configured
10 Ω to 2000 Ω RTD including
100 Ω: 0.00385α, 0.00391α,
10 Ω Cu, 1000 Ω Ni-Fe,
120 Ω Ni or special

API 1400 G Single Alarm Trip
One DPDT contact set
Standard: HI alarm, normal acting,
adj. deadband, non-latching
See data sheet for alarm options

API 1420 G Dual Alarm Trip
Two SPDT contact sets
Standard: HI/LO alarms, normal acting,
1% deadband, non-latching
See data sheet for alarm and deadband options

  • User adjustable setpoint(s)
  • 2-wire or 3-wire RTD
  • Lead wire compensation for 3-wire
  • 8 Amp contacts
  • Hot-swappable plug-in design
  • Input LoopTracker LED
  • Alarm status LEDs
  • Alarm options: LO, HI/HI, LO/LO
  • Optional reverse acting
  • Optional latching alarms
  • 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 1400G
API 1400 G, API 1420 G

RTD to DC Isolated Transmitter


Factory Configured

APD 4001

Open Datasheet
Download Datasheet
Specify RTD type and temperature range
10 Ω to 2000 Ω RTD including
100 Ω: 0.00385α, 0.00391α,
10 Ω Cu, 1000 Ω Ni-Fe,
120 Ω Ni or special

Specify output range
0-1 V to 0-10 V
±1 V to ±10 V
0-1 mA to 0-20 mA, 4-20 mA
  • RTD linearization
  • Removable plugs
  • I/O LoopTracker LEDs
  • Output test button
  • Full I/O/power isolation
  • 2-wire or 3-wire RTD
  • Lead wire compensation for 3-wire
  • DIN rail mount
  • Universal power 85-265 VAC, 60-300 VDC
  • D option for 9-30 VDC, 10-32 VAC power

APD4001UL approved
APD 4001

Universal Temperature Input to DC Isolated Transmitter


Field Programmable


APD 4000

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

APD4000 UL approved
APD 4000

Universal Input to DC Isolated Signal Conditioner


Field Programmable


APD 8000

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

APD8000 UL approved new!
APD 8000

RTD or Thermistor Input to DC Isolated Transmitter


Factory Configured

APD 4002

Open Datasheet
Download Datasheet
Factory set input range
RTD: 2, 3, or 4 wire, 10 Ω to 8000 Ω RTD
Thermistor: 44000 series, YSI 400, Spectrum
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
  • Covers all common RTDs and Thermistors
  • 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

APD4002 UL approvedNew!
APD 4002

Universal RTD to DC Isolated Transmitter


Field Programmable


APD 4151

Open Datasheet
Download Datasheet
Field programmable input
RTD: 2, 3, or 4 wire, 10 Ω to 8000 Ω RTD
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 RTD 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

APD4151 UL approvedNew!
APD 4151

RTD to DC Isolated Transmitter


Factory Configured

API 4001 G L

Open Datasheet
Download Datasheet
Specify RTD type and temperature range
Factory configured
10 Ω to 2000 Ω RTD including
100 Ω: 0.00385α, 0.00391α
10 Ω Cu, 1000 Ω Ni-Fe,
120 Ω Ni or special

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

  • RTD linearization
  • Hot-swappable plug-in design
  • I/O LoopTracker LEDs
  • Output test button
  • Full I/O/power isolation
  • 2-wire or 3-wire RTD
  • Lead wire compensation for 3-wire
  • 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 4001G L UL listed
API 4001 GL

Differential RTD to DC Transmitter


Factory Configured

API 4001 G SA-B

Open Datasheet
Download Datasheet
Specify temperature range
Factory configured
Two 100 Ω 0.00385α RTDs
ΔT from 20F° to 900F° or
10C° to 500C°

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
  • Hot-swappable plug-in design
  • I/O LoopTracker LEDs
  • Output test button
  • 2-wire or 3-wire RTD
  • Lead wire compensation for 3-wire
  • Linearized RTD
  • Inputs can be field calibrated
  • 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 4001G SAB
API 4001 G SA-B

Universal Input to 4-20 mA Loop Powered Transmitter


Field Programmable


K121

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

100 Ω RTD to DC Isolated Transmitter


Field Configurable


K109PT

Open Datasheet
Download Datasheet

Open Installation Manual
Download Installation Manual

Click to see ALL Seneca products

Field Configurable Input
Input: One 100 Ω RTD, 385 Curve RTD, 2, 3, or 4 wire
–150 to 650°C, (–238 to 1202°F), 50°C min. span

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 
K107A
K109PT

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

IsoSplitter® Signal Splitter
1 RTD Input to 2 DC Outputs


Factory Configured

APD 1393

Open Datasheet
Download Datasheet
Specify RTD type and temperature range
Factory configured
10 Ω to 2000 Ω RTD including
100 Ω 0.00385α
100 Ω 0.00391α,
10 Ω Cu
1000 Ω Ni-Fe
120 Ω Ni or special

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 RTD 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

RTD IsoSplitterUL approved
APD 1393

DuoPak® 2 Channel Isolated Signal Conditioners


Factory Configured

APD 2000 Series

Specify input range for each channel

APD 2001 Ch1: DC mV/V/mA Ch2: RTD
APD 2011 Ch1: RTD Ch2: RTD
APD 2013 Ch1: RTD Ch2: Potentiometer
APD 2015 Ch1: RTD Ch2: Strain gauge
APD 2016 Ch1: RTD Ch2: AC mV/V/mA
APD 2017 Ch1: RTD 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 RTD

ThermoPro®
Battery Powered RTD Temperature Indicator


Field Configurable


T16B
T16BBL: Backlit display

Open Datasheet
Download Datasheet
T16BBL: Backlit display
  • Specify RTD length
  • Specify fixed or spring-loaded RTD
  • Use spring-loaded for a thermowell
  • Specify default temperature units
    • –58.0°F to 392.0°F or
    • –50.0°C to 200.0°C or
    • 223.0 K to 473.0 K
  • Choose auto shutoff time
    • -5 five minutes (default if not specified)
    • -10 ten minutes
    • -30 thirty minutes
    • -ON on/off only
  • See data sheet for complete model numbers
  • Battery life to 1000 hrs
  • BL red LED display backlight battery life up to 750 hrs
  • Includes 2 AA batteries
  • Configurable auto shutoff time
  • Selectable °F, °C or K
  • Selectable auto shutoff time
  • Configurable min/max memory
  • Able to retain min/max if power is off
  • Pass code protected setup and calibration

ThermoPro battery powered
T16B

ThermoPro®
Loop Powered Indicating RTD Transmitter


Field Configurable


T16L

Open Datasheet
Download Datasheet
  • Specify RTD length
  • Specify fixed or spring-loaded RTD
  • Use spring-loaded for a thermowell
  • Specify temperature range of output
    • –58.0°F to 392.0°F or
    • –50.0°C to 200.0°C or
    • 223.0 K to 473.0 K
  • See data sheet for complete model numbers
  • 2-wire design
  • Powered by 8-32 VDC 4-20 mA current loop
  • User-programmable 4-20 mA output range
  • Selectable °F, °C or K
  • Pass code protected setup and calibration
  • Old model number: F16LT

ThermoPro
T16L

ThermoPro®
Indicating RTD Temperature Alarms


Field Configurable


T16ADA
T16ADABL: Backlit display

Open Datasheet
Download Datasheet
  • Specify RTD length
  • Specify fixed or spring-loaded RTD
  • Use spring-loaded for a thermowell
  • Specify default temperature units
    • –58.0°F to 392.0°F or
    • –50.0°C to 200.0°C or
    • 223.0 K to 473.0 K
  • See data sheet for complete model numbers
  • User-programmable alarms
    • User-programmable alarm logic
    • User-programmable setpoints
    • 2 SPDT relays
    • 1A@24 VDC, or 0.5A@115VAC, non-inductive
  • Selectable °F, °C, or K temperature units
  • Powered by 8-32 VDC, 10-32 VAC
  • User configurable relay operation
  • Push to test alarms
  • Pass code protected setup and calibration

ThermoPro alarm
T16ADA

Head-Mount RTD Transmitter, Non-Isolated


Field Programmable


Fits DIN Form B Heads

T120

Open Datasheet
Download Datasheet

Open Installation Manual
Download Installation Manual

Click to see ALL Seneca products

Programmable
Input: Pt100 or Ni100 RTD
2, 3, or 4 wire

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

  • Order T120-C and specify I/O for pre-programmed model
  • 44 mm dia
  • EASY-USB configuration
  • Low cost
  • DIN B mount with 5.8 mm (0.228" dia) center hole
  • Power: 19.2 to 30 VDC current loop

T121  CE logo  new

T120

Head-Mount Universal Transmitter, Isolated


Field Programmable


Fits DIN Form B Heads

T121

Open Datasheet
Download Datasheet

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

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
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