Signal Conditioners, Alarms, Transmitters: RTD Temperature Input

RTD Alarms and Transmitters
6 Year Warranty on API Modules LoopTracker^® LEDs Hot-Swappable Plug-In Design Zero and Span Output Calibration Push to Test Output Full I/O/Power Isolation Links Product brochure Options & accessories Regulatory compliance Click on PDF links below for product information	Reference Info Ground Loops RFI/EMI LoopTracker and Output Test Sink or Source Applications Dam Bubbler Chiller Temperature Bearing Temperature Motor Temperature Motor Overheating	How to select your product Open pdf datasheet for your model Select model, range, units, options, accessories Contact us if you need assistance Need a quote? Contact us at , or Get a quote via "Chat with us" below, or Call 800-942-0315 and ask for Sales	Ready to order? Send your order to If you don't have open terms with us, we'll call you for your credit card info Other ways to order Click here to set up an account Click here to find your authorized dealer or if you are outside the USA Call us to find your local authorized distributor
Model	Input/Output	Features	Product
RTD or Thermistor Input Alarm Trips Factory Configured APD 1401 from $379 APD 1421 from $399 Open Datasheet Download Datasheet	RTD: specify type, 2, 3 or 4 wire, and temperature range Factory configured 10 Ω to 2000 Ω RTD including 100 Ω: 0.00385α, 0.003916α, 0.00392α, 10 Ω Cu, 1000 Ω Ni-Fe, 120 Ω Ni or Special Thermistor: specify type and temperature range. For other sensor types provide temperature-resistance chart. Factory configured 44004/44033 2.252 kΩ at 25°C 44005/44030 3.000 kΩ at 25°C 44007/44034 5.000 kΩ at 25°C 44006/44031 10.00 kΩ at 25°C 44008/44032 30.00 kΩ at 25°C YSI 400 2.252 kΩ at 25°C Spectrum 1003k 1 kΩ APD 1401 Single Alarm Trip Dual DPST contact sets Standard: HI alarm, non-latching, normal acting APD 1421 Dual Alarm Trip Two DPST contact sets Standard: HI/LO alarms, normal acting, two set/reset adjustments, non-latching See data sheet for alarm options	New microprocessor-based version Complete RTD or thermistor selection Microprocessor controlled input linearization More burnout options Improved setpoint/reset point control 2-, 3-, or 4-wire RTD Lead wire compensation for 3-, or 4-wire User adjustable set and reset point(s) 8 Amp contacts Removable plugs for easier installation Input LoopTracker LED and output test button Alarm status LEDs Alarm options: LO, HI/HI, LO/LO, band alarm Optional reverse acting, optional latching DIN rail mount without tools Universal power 85-265 VAC, 60-300 VDC D option for 9-30 VDC, 10-32 VAC power	APD 1401, APD 1421
RTD Input Alarm Trips Factory Configured APD 1400 from $369 APD 1420 from $389 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, APD 1420
RTD Input Alarm Trips Factory Configured API 1400 G from $309 API 1420 G from $339 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, adjustable deadband Standard: HI alarm Optional: LO alarm API 1420 G Dual Alarm Trip Two SPDT contact sets, 1% deadband Standard: HI/LO alarms, normal acting Optional: LO/HI, HI/HI, LO/LO alarms	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 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 1400 G, API 1420 G
RTD to DC Isolated Transmitter Factory Configured APD 4001 from $449 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	APD 4001
Universal Input to DC Isolated Signal Conditioner Field Programmable APD 8000 from $529 *Free I/O Range Setup* Include your I/O ranges on your order, and we'll set it up for you! Open Datasheet Download Datasheet Open Feature Summary Download Feature Summary	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 sink/source output 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	APD 8000
RTD to DC Isolated Transmitter Factory Configured API 4001 G L from $449 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: 85-265 VAC, 60-300 VDC power (+$60) D option: 9-30 VDC power (+$60)	API 4001 GL
Universal Input to 4-20 mA Loop Powered Transmitter Field Programmable K121 $165 stock item K121-C $190 ranged to order Open Datasheet Download Datasheet Open Installation Manual Download Installation Manual Click to see ALL Seneca products	Field Programmable Input Requires EASY-USB for configuration 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 DIN rail mount without tools Powered by 4-20 mA loop	K121
100 Ω RTD to DC Isolated Transmitter Field Configurable K109PT $250 stock item 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	K109PT
IsoSplitter^® Signal Splitter 1 RTD Input to 2 DC Outputs Factory Configured APD 1393 from $609 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	APD 1393
DuoPak^® 2 Channel Isolated Signal Conditioners Factory Configured APD 2000 Series from $609	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	APD 2000 Series RTD
RTD to DC Isolator/Converter 2/3/4 wire RTD to mA/V output Z109PT2-1 $259 Open Brochure Download Brochure Open Installation Manual Download Installation Manual Click to see ALL Seneca products Download .dwg CAD Drawing Download .stp 3-D Drawing	Input One RTD Selectable for Pt100, Pt500, Pt1000, Ni100 2/3/4 wire Configurable range Output One isolated mA or Voltage Sink or source mA Configurable range	Configurable via DIP switches, USB, or Android app 3-way isolation 9-40 VDC/19-28 VAC power Free setup software Free Android App 1 year warranty DIN rail mount 17.5 mm wide	Z109PT2-1
Universal Input to DC Isolator/Converter V, mA, Ohms, TC, RTD Z109REG2-1 $289 Open Brochure Download Brochure Open Installation Manual Download Installation Manual Click to see ALL Seneca products Download .dwg CAD Drawing Download .stp 3-D Drawing	Configurable Input mV, V, (Bipolar from 75 mV to 20 V) mA (Bipolar up to 20 mA) RTD: Pt100, Pt500, Pt1000, Ni100, KTY81, KTY84, NTC; 3-4 wire Thermocouple: Type J, K, R, S, T, E, B, N, Potentiometer: 500 Ω to 100 kΩ Rheostat: 500 Ω to 25 kΩ Strobe: Alternative to output relay Output One isolated mA or Voltage Sink or source mA Configurable range 1 relay output	Configurable via DIP switches, USB, or Android app 3-way isolation 9-40 VDC/19-28 VAC power Free setup software Free Android App 1 year warranty DIN rail mount 17.5 mm wide	Z109REG2-1
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 equipment Automatic gain control	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 instrument gain or offset Provide programmable adjustment for delays, filters or time constants.	ATP168
ThermoPro^® Battery Powered RTD Temperature Indicator Field Configurable T16B $409 T16BBL: Backlit display $439 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	T16B
ThermoPro^® Loop Powered Indicating RTD Transmitter Field Configurable T16L $409 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	T16L
ThermoPro^® Indicating RTD Temperature Alarms Field Configurable T16ADA $499 T16ADABL: Backlit display $529 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	T16ADA
Head-Mount RTD Transmitter, Non-Isolated Field Programmable Fits DIN Form B Heads T120 $89 stock item T120-C $109 pre-programmed to order Open Datasheet Download Datasheet Open Installation Manual Download Installation Manual Click to see ALL Seneca products	Programmable Requires EASY-USB for configuration 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 DIN B mount with 5.8 mm (0.228" dia) center hole Power: 19.2 to 30 VDC current loop	T120
Head-Mount Universal Transmitter, Isolated Field Programmable Fits DIN Form B Heads T121 $159 stock item T121-C $179 pre-programmed to order Open Datasheet Download Datasheet Open Installation Manual Download Installation Manual Click to see ALL Seneca products	Programmable Requires EASY-USB for configuration 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 I/O isolation DIN B with 5.8mm (0.228"dia) center hole Power: 7 to 30 VDC current loop	T121
USB - UART TTL Converter EASY-USB $140 stock item Open Datasheet Download Datasheet Open Installation Manual Download Installation Manual EASY-USB Software Link	Programming Kit for K121, T120, T121	Includes Converter Software mini CD (or download latest) Adapter cable (std USB cable not included)	EASY-USB
4 Digit 4-20 mA Loop Powered Display Field Rangeable S315 $150 stock item S315-IP66 $310 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	S315

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RTD Alarms and Transmitters

RTD or Thermistor Input Alarm Trips

APD 1401 from $379 APD 1421 from $399

RTD Input Alarm Trips

APD 1400 from $369 APD 1420 from $389

RTD Input Alarm Trips

API 1400 G from $309 API 1420 G from $339

RTD to DC Isolated Transmitter

APD 4001 from $449

Universal Input to DC Isolated Signal Conditioner

Field Programmable

APD 8000 from $529

RTD to DC Isolated Transmitter

API 4001 G L from $449

Universal Input to 4-20 mA Loop Powered Transmitter

Field Programmable

K121 $165 *stock item*

K121-C $190 ranged to order

100 Ω RTD to DC Isolated Transmitter

Field Configurable

K109PT $250 *stock item*

IsoSplitter® Signal Splitter 1 RTD Input to 2 DC Outputs

APD 1393 from $609

DuoPak® 2 Channel Isolated Signal Conditioners

APD 2000 Series from $609

RTD to DC Isolator/Converter 2/3/4 wire RTD to mA/V output

Z109PT2-1 $259

Universal Input to DC Isolator/Converter V, mA, Ohms, TC, RTD

Z109REG2-1 $289

Analog To Resistance Converter

ATR167 call for quote

Analog To Potentiometer Converter

ATP 168 call for quote

ThermoPro® Battery Powered RTD Temperature Indicator

Field Configurable

T16B $409 T16BBL: Backlit display $439

ThermoPro® Loop Powered Indicating RTD Transmitter

Field Configurable

T16L $409

ThermoPro® Indicating RTD Temperature Alarms

Field Configurable

T16ADA $499 T16ADABL: Backlit display $529

Head-Mount RTD Transmitter, Non-Isolated

Field Programmable

T120 $89 *stock item*

T120-C $109 pre-programmed to order

Head-Mount Universal Transmitter, Isolated

Field Programmable

T121 $159 *stock item*

T121-C $179 pre-programmed to order

USB - UART TTL Converter

EASY-USB $140 *stock item*

4 Digit 4-20 mA Loop Powered Display

Field Rangeable

S315 $150 *stock item* S315-IP66 $310

APD 1401 from $379
APD 1421 from $399

APD 1400 from $369
APD 1420 from $389

API 1400 G from $309
API 1420 G from $339

Universal Input to 4-20 mA
Loop Powered Transmitter

K121 $165 stock item

K109PT $250 stock item

IsoSplitter^® Signal Splitter
1 RTD Input to 2 DC Outputs

DuoPak^® 2 Channel Isolated Signal Conditioners

RTD to DC Isolator/Converter
2/3/4 wire RTD to mA/V output

Universal Input to DC Isolator/Converter
V, mA, Ohms, TC, RTD

ThermoPro^®
Battery Powered RTD Temperature Indicator

T16B $409
T16BBL: Backlit display $439

ThermoPro^®
Loop Powered Indicating RTD Transmitter

ThermoPro^®
Indicating RTD Temperature Alarms

T16ADA $499
T16ADABL: Backlit display $529

T120 $89 stock item

T121 $159 stock item

EASY-USB $140 stock item

S315 $150 stock item
S315-IP66 $310