The Smartswitch TD 4000 tank Monitor/Pump Control is suitable for diesel, petrol, grey, freshwater and black tanks AND includes the capability to monitor up to (4) tanks, control (1) pump) and/or monitor up to (4) batteries batteries all in a compact, low cost package.

Example pricing:  One(1) TD-4000 with one (1) tank level sensor (either a new pressure type or interface to existing resistance-type WEMA sender), and control for one (1) pump ....  less than $350.00

Add up to 3 more pressure tank sensors @ $95 each
Add up to 3 more WEMA resistance sender adapter @ $105
Add up to 3 more ultrasonic tank sensors@ $166 each
Add up to 3 battery sensors @ $65 each

Simple to install, the TD 4000 comes with two setup options depending on regular or odd tank shape.  Two point calibration for regular shaped tanks (low and full) and five point calibration for odd shaped tanks.

Monitor and control up to 4 Tanks or Batteries or combination of both 

For Tanks:
  • Two or five point calibration means you can monitor any shaped tanks.
  • Solid State micro processor display head means accurate tank readings.
  • Four inputs so you can monitor up to four tanks/batteries
  • Two display modes allow tank info to be read in percentages and litres/gallons/volts or bar graph
  • Programmable alarms means alarm when Grey/Black tanks are full or Fresh/Fuel are empty
  • 12-24 Volt auto-sensing
  • Back-light on or off
  • Name individual tanks/batteries i.e. Fresh Port, Black, Grey or house, aux battery or as required
  • Attractive blue LCD display with white text for easy to read display

For Batteries:
  • The TD 4000 can monitor up to 4 batteries using the optional BAT-100   (0-30 volt DC)

Click on these links for details on SmartSwitch  

TD-4000 Four Channel Tank and Battery Monitoring


The TD 4000 comes standard with many intelligent features to measure up to four tanks, four batteries, or a combination of both.
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TD 4000 Tank/Battery Monitor