KAM Simple Precision
ATD Automatic Tank Dewatering System

ATD™ insertable model

Tank dewatering is vital for maximizing crude oil storage and minimizing tank corrosion, but manual operations can be costly in terms of inaccuracy, manpower and environmental liabilities. The KAM ATD Automatic Tank Dewatering system ensures maximum storage efficiency without the danger of hydrocarbons contaminating the draw-off line.

Sold as a complete system or as individual units that users can connect to an existing PLC, the ATD uses two microwave probes to monitor water levels in the tank.  Communicating with a PLC, the system controls an MOV (motor operated valve) on the draw off line–opening when water levels rise, and closing when the emulsion layer has descended to the bottom of the tank.

The KAM ATD probe is also unique in its solid body design, preventing the accumulation of paraffin or other contaminants on the probe which prevent the probe from accurately registering rising water levels.

CLICK HERE to learn more about how the ATD works.


  • The ATD uses 2 microwave probes to monitor water levels in the tank. When the probe detects the emulsion layer, it signals the closing of the MOV valve on the dewatering line. Should the valve fail to close for any reason, the second probe in the tank sets off an alarm as well as triggering the closing of the MOV valve.


  • Solid antenna design prevents tank debris from clogging probe
  • Inserts directly into the tank without the need to drain the tank
  • All requisite electronics for probes housed within unit and included in unit price


  • Automatic Tank Dewatering
  • Desalter Optimization
  • In tank or draw-off line installations
  • Oil skimming
Media: Crude oil, refined products and chemicals
Material: Wetted parts – 316 stainless steel
Fluid temp.: To 176ºF (80ºC)
Electronics temp.: -40º to 160ºF (-40º to 70ºC)
Power: 24 VDC/1 amp at 24 watts
Accuracy: +/- 5%
Repeatability: +/- 0.05%
Resolution: +/- 0.01%
Outputs: Selectable 4–20 mA with adjustable range or 0–5 VDC
  Digital Out - 24 V max
Pressure ratings: ANSI 150, 300, 600, 900, 1500
Hazardous areas: PTB 08 ATEX 2016 Issue 01
IECEx PTB EX 19.0048
Ex db IIB T6 Gb 
Sensor dimensions: Ø1.5" x 1.5" (38mm x 38mm)
EX enclosures: Sensor electronics - 3" x 6" x 3" (76mm x 152mm x 76mm)
Shaft length: User defined up to 16"
Weight: from 20 lbs. (9kg)
Hazardous areas: ATEX II 2 G Ex d IIB T6 Gb
  NEMA4 (IP66 equivalent)