DuoPak Two Channel Analog Signal Converters, Isolators, Transmitters - Two Independent I/O Channels

lifetime warranty
  • Any Two Inputs
    (AC, DC, Pot, RTD, Strain, Frequency)
  • Any Two DC Outputs
  • Lifetime Warranty on API Modules
  • LoopTracker® I/O LEDs
  • Hot-Swappable Plug-In Design
  • Zero and Span Output Calibration for Each Channel
  • Push to Test Output
  • Full I/O/Power Isolation
Click on model numbers below
for data sheets
Literature and Links

API product brochure

Options & accessories

UL Approvals

API modules USA
API modules Canada

APD modules USA
APD modules Canada

Reference Info

Ground Loops
LoopTracker and Output Test
Sink vs Source


Monitoring a station battery
Isolate level xmtr, radio modem, and PLC
Isolate pH and ORP sensors
How to Order
  1. Select a model
  2. See data sheet for ordering info and power options
  3. See Price list
  4. 2-5 day typical lead time (USA customers)
  5. To place your order
Model Input/Output Features Product
Two Channel Signal Conditioners

DIN Style

APD 2000 Series

Specify input range for each channel
Factory configured
APD 2000 Ch1: DC mV/V/mA Ch2: DC mV/V/mA
APD 2001 Ch1: DC mV/V/mA Ch2: RTD
APD 2003 Ch1: DC mV/V/mA Ch2: Potentiometer
APD 2005 Ch1: DC mV/V/mA Ch2: Strain gauge
APD 2006 Ch1: DC mV/V/mA Ch2: AC mV, V, mA
APD 2007 Ch1: DC mV/V/mA Ch2: Frequency
APD 2010 Ch1: RTD Ch2: DC mV/V/mA
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
APD 2030 Ch1: Potentiometer Ch2: DC mV/V/mA
APD 2031 Ch1: Potentiometer Ch2: RTD
APD 2033 Ch1: Potentiometer Ch2: Potentiometer
APD 2035 Ch1: Potentiometer Ch2: Strain gauge
APD 2036 Ch1: Potentiometer Ch2: AC mV/V/mA
APD 2037 Ch1: Potentiometer Ch2: Frequency
APD 2050 Ch1: Strain gauge Ch2: DC mV/V/mA
APD 2051 Ch1: Strain gauge Ch2: RTD
APD 2053 Ch1: Strain gauge Ch2: Potentiometer
APD 2055 Ch1: Strain gauge Ch2: Strain gauge
APD 2056 Ch1: Strain gauge Ch2: AC mV/V/mA
APD 2057 Ch1: Strain gauge Ch2: Frequency
APD 2060 Ch1: AC mV/V/mA Ch2: DC mV/V/mA
APD 2061 Ch1: AC mV/V/mA Ch2: RTD
APD 2063 Ch1: AC mV/V/mA Ch2: Potentiometer
APD 2065 Ch1: AC mV/V/mA Ch2: Strain gauge
APD 2066 Ch1: AC mV/V/mA Ch2: AC mV/V/mA
APD 2067 Ch1: AC mV/V/mA Ch2: Frequency
APD 2070 Ch1: Frequency Ch2: DC mV/V/mA
APD 2071 Ch1: Frequency Ch2: RTD
APD 2073 Ch1: Frequency Ch2: Potentiometer
APD 2075 Ch1: Frequency Ch2:Strain gauge
APD 2076 Ch1: Frequency Ch2: AC mV/V/mA
APD 2077 Ch1: Frequency Ch2: Frequency

Specify output range for each independent DC output channel
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


UL approved
APD 2000 Series