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, refined products and water
Material: Wetted parts–316 stainless steel*, PEEK
Electronics enclosure–Copper-free aluminum
Process temperature: -32ºF to 176ºF (0ºC to 80ºC)
Ambient temperature: -4ºF to 131ºF (-20ºC to +55ºC)
Temps below 32ºF (0ºC) require heat tracing
Power: 24 VDC/1 amp at 24 watts
Accuracy: +/- 5%
Repeatability: +/- 0.01%
Resolution: +/- 0.01%
Outputs: 4–20 mA
Alarm relay
RS485 Modbus on non-HART models
HART (Optional)
Mounting: 2″ MNPT seal housing for tank mounted models*
2″, 3″, or 4″ flanged seal housing for tank mounted models
Flanged fixed insertion for draw-off line installations
Pressure ratings: ANSI 150, 300
Sensor dimensions: Ø1.3″ x 1.25″ (33.1 mm x 31.75 mm)
Hazardous Area: PTB 08 ATEX 1026
II 2 G Ex db IIB T6 Gb
IECEx PTB 19.0048
Ex db IIB T6 Gb
EX enclosure: 4.4″ x 7.1″ x 4.6″ (101.5 mm x 180.3 mm x 117 mm)
Shaft length: Per user specification up to 16″
Weight: from 20 lbs. (9kg)

* Seal Housing for 2″ MNPT Models are Carbon Steel.



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KAM ATD Application Data Sheet

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  • Please fill out the following fields to the best of your ability.

  • Installation type

For dewatering line
For tank insertion
For tank insertion
  • This field is for validation purposes and should be left unchanged.