API Retired Signal Conditioners

Below are links to datasheets for discontinued products.
We still provide technical support for these and API signal conditioners still carry our lifetime warranty.
Many new models have upgraded features. Feel free to call up to upgrade to the current model.
Discontinued AC
APD 1630 AC Input Band Alarm Trip
Discontinued DC Input Alarms
APD 1030 DC Input Band Alarm Trip
API 1080 DIN DC Input Single Alarm Trip. See APD 1080
API 1090 DIN
API 1090 DD
DC Input Dual Alarm Trip. See APD 1090
Discontinued DC
API 2000
API 2000DD
API 20xx Series
DuoPak 2 Channel Transmitters. See APD 2000
API 4051 SA-B DC-DC Differential Transmitter. See Math modules
API 4300 DIN
API 4300 DD
DC-DC Transmitter. See APD 4300
API 4300 DIN PLC
API 4300 DD PLC
4-20 mA DC-DC Transmitter. See APD 4300
API 4380 DIN
API 4380 DD
DC-DC Transmitter. See APD 4380
API DPI HV-DC High Voltage DC-DC Transmitter. See APD HV-DC
API 4010 G Non-Isolated DC-DC Transmitter with loop power supply. See API 4300 G
API 4050 G Non-Isolated DC-DC Transmitter Narrow Input Span with loop power supply. See APD 4300
API 4390 DIN
API 4391 DIN
API 4392 DIN
2 Channel DC-DC Transmitter Isolators. See APD 2000
API 4393 DIN IsoSplitter DC-DC Signal Isolator-Splitter. See APD 4393 or APD 4930
API 1040 G DC Input Single Alarm Trip and DC Transmitter
API 4001 G S A-B RTD Differential Input to DC Transmitter
API 4401 G
API 4402 G
API 4403 G
API 4404 G
API 4405 G
API 4406 G
API 4407 G
API 4408 G
DC to DC Signal Conditioners with Math Functions. See APD 44xx math modules
API 4440 G DC to DC Signal Conditioners with Square Root Extraction. See APD 44xx math modules
LPI-1, LPI-2 Loop Powered Isolators, Plug In Style. See newer models
DPI-2 Loop Powered Isolator, 2 Channel DIN Style. See newer models
Discontinued Frequency
API 1720G Frequency Input Dual Alarm Trip. See APD 1720
APD 1730 Frequency Input Band Alarm Trip
Discontinued Potentiometer
API 1800G Potentiometer Input Single Alarm Trip. See APD 1800
API 1820 G Potentiometer Input Dual Alarm Trip. See APD 1820
API 4003 G Potentiometer to DC Signal Conditioners, non-isolated. See isolated API 4003 G I
APD 1830 Potentiometer Input Band Alarm Trip
Discontinued Strain Gauge
API 1500 G
1520 G
Bridge Input Single Alarm Trip. See APD 1500 series
API 4051 G Bridge to DC Signal Conditioners, Non-isolated. See API 4051 GI
API 4059 DIN Isolated Bridge to DC Signal Conditioners. See APD 4059
API SUM-000
API SUM-025
Bridge Summing Board. See SG-EQ4 SG-EQ4 (scroll down)
API SUM Board Bridge Summing Board Detailed Instruction Manual
APD 1530 Strain Gauge Input Band Alarm Trip
Discontinued Temperature
APD 1430 RTD Band Alarm Trip
API 4000 G RTD or T/C to DC Signal Conditioners. See APD 4000
API 4100 G Non-Isolated T/C-DC Transmitter. Replaced by new design API 4130 GL
API 4130 GL
sold before 07-12-16
Non-microprocessor T/C-DC Transmitter. Replaced by new design API 4130 GL
Discontinued Power Supplies
API 9046 Series DC power supplies (discontinued)
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