RTD 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

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

RTD Input Alarm Trips


Factory Configured
APD 1400  from $289
APD 1420  from $309

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 1400 UL approved
APD 1400, APD 1420

RTD Input Alarm Trips


Factory Configured
API 1400 G  from $279
API 1420 G  from $299

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  from $375

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

APD4001 UL approved
APD 4001

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

RTD or Thermistor Input to DC Isolated Transmitter


Factory Configured
APD 4002  from $375

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 approved New!
APD 4002

Universal RTD to DC Isolated Transmitter


Field Programmable


APD 4151  from $395

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
  • For orders of 5 or more, call us for lead times

APD4151 UL approved New!
APD 4151

RTD to DC Isolated Transmitter


Factory Configured
API 4001 G L  from $409

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  from $409

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  $149 *1 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

100 Ω RTD to DC Isolated Transmitter


Field Configurable


K109PT  $169 *in stock*

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  from $499

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 IsoSplitter UL approved
APD 1393

DuoPak ® 2 Channel Isolated Signal Conditioners


Factory Configured
APD 2000 Series  from $519

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

DuoPak UL approved
APD 2000 Series RTD

ThermoPro ®
Battery Powered RTD Temperature Indicator


Field Configurable


T16B   $389
T16BBL: Backlit display  $419

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   $389

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   $479
T16ADABL: Backlit display  $499

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  $89 *in stock*

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  $159 *in stock*

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
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

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
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