Frequently Asked Questions

General Questions

KUS Sending Units

To identify your current KUS sending unit, please look at the model number on the aluminum cap at the top of the unit (where the wires are).

Model & Length

KUS Gauges

To identify your current KUS gauge, please look at the sticker on the back of the gauge for the model & part number.

Model Number & Operating Range

If you do not have a KUS sending unit and need to identify a KUS replacement for your unit, please contact us the following information:

  • Tank Depth/Current sender length.
  • Output/Operating ohms range.
  • Mounting style. (How the unit mounts to the tank)

Discontinued models

Please click the link below to identify your discontinued model for replacement.

View Discontinued Models

Our standard sending units have two wires:

  • Pink connects to ground
  • Black connects to the gauge.

For further clarification please see our Sending Unit Installation Guide.

Our standard liquid level gauges have 5 wires:

  • Red connects to power
  • Blue connects to ground
  • Black connects to the sending unit
  • Yellow and Orange connect to power for the backlight options.

Please refer to the gauge installation instructions for further clarification.

Please contact us if your sending unit/gauge has additional or alternate wire colors.

To test the ohms range on a sending unit:

  1. Connect your unit to an ohm meter or multimeter.
  2. Ensure your meter is set to Resistive 2000 (2k) ohms.
  3. Position the float at the empty position and manually move it from empty to full.
  • For American Standard sending units the unit will read 240 at empty and 33 at full (+/- 5 ohms).
  • For European Standard sending units, the unit will read either 0 or 10 at empty and 180, 190 or 90 at full (+/- 5 ohms).

To test the ohms on your gauge:

  1. Make sure the Power to the gauge is not on.
  2. Disconnect the black wire to the sending unit, at the gauge end. Note, you may have to cut the wire (you can always re-connect it later). Leave enough wire at the gauge end to work with. Do not cut it too short.
  3. With the black wire disconnected, turn the 12 VDC power to the gauge ON.
  4. The gauge needle, will:
  • On the American version gauge (240 . 30 ohms), stay at Empty. Ground the black wire (at the gauge end), and the needle will go to Full.
  • On the European version gauge (0 . 180 ohms), go to Full. Ground the black wire (at the gauge end), and the needle will go to Empty.

To make a warranty or non-warranty return please contact us for a returns good authorization number. Please also include a picture of the top of your sending unit or the back of your gauge, and any invoice, purchase order or sales order information.

Please contact us to process an order with a FL sales tax certificates.

Please note that our webstore automatically includes taxes for Florida orders.

Unfortunately, at this time we do not allow walk in/pick up customers at our location. We do however offer free ground shipping in the state of Florida when placing an order through our online system.

For troubleshooting instructions please see our Troubleshooting Guide


Gauge Instrumentation Questions

A gauge will read backwards if your ohms range is not matched. If your gauge is reading a European standard ohms range and your sending unit is an American standard ohms range, or vice versa, the readings will be backwards.

To correct this problem, you would either need to replace your sending unit or gauge.


Liquid Level Sending Unit Questions

For additional specifications of the sending units please select “Product Data Sheets” under the Support Tab or click here.

We offer the following outputs for our sending units:

  • Resistive (ohms) – American Standard: 240-33 (available online), European Standard: 0-180, 10-180, 0-190, 0-90 (contact us for pricing and availability)
  • 4-20 mA (contact us for pricing and availability)
  • 0-5 volts or 0.5-4.5 volts (contact us for pricing and availability)
  • Digital Signals such as J1939, RS232, RS485, CanBUS (contact us for pricing and availability)

We offer the following customization’s for our units, please contact us for pricing and availability.

  • Ullage
  • Special Ohms Range Calibrations
  • Hi/Low Switches
  • Linear Resolution
  • Plugs (MetriPak & Deutsch)

We offer the following gaskets for the SSS/SSL units:

  • Cork/Nitrile
  • Nitrile
  • Viton

Please click here to order a Gasket Mounting Kit.

The float is NBR material.

To clean the SHS/SHST remove the unit from the tank, and cautiously remove the bell shaped pin at the bottom of the unit. Once the pin is removed the outer casing can be removed from the sending unit. Clean the unit with water, NO HARSH CHEMICALS. Remove any blockages from unit that may interfere with the float. Reassemble unit and reinsert into tank.