ATD Automatic Tank Dewatering System


ATD Automatic Tank Dewatering System insertable model
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


Media: Crude oil
Material: Wetted parts – 316 stainless steel
Fluid temp.: To 300ºF (149ºC) High temp model available to 600ºF (315ºC)
Electronics temp.: -4º to 131ºF (-20º to 55ºC)
Power: 24 VDC/1 amp at 24 watts
Accuracy: +/- 1%
Repeatability: +/- 0.01%
Resolution: +/- 0.01%
Outputs: 4–20 mA
Alarm relay
RS232 for calibration / diagnostics
RS485 Modbus
HART (Optional)
Pressure ratings: ANSI 150, 300, 600, 900, 1500, 2500
Sensor dimensions: Ø1.5″ x 1.5″ (38mm x 38mm)
EX enclosures: Sensor electronics – 4.6″ x 7.1″ x 4.4″ (117mm x 180mm x 112mm)
Shaft length: User defined up to 16″
Weight: from 20 lbs. (9kg)
Certifications: PTB 08 ATEX 1026
(Ex II 2 G Ex db IIB T6 Gb)



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KAM ATD Application Data Sheet

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  • Installation type

For dewatering line
For tank insertion
For tank insertion