Sludge Finder 2

  • Continuous single or dual-channel level control
  • High frequency gives high-reliability long term
  • Self-cleaning transducer removes the need for regular inspection
  • SBR tank applications can be monitored
  • Easy set-up via the drop-down menu on large clear display
  • The unit can track two different echoes with one transducer
  • Radio telemetry system – optional
  • Description
  • Application Areas
  • Specifications
  • Brochure
  • User’s Guide

Product Description

The Sludge Finder 2 is used in thousands of applications worldwide to detect sludge blanket levels in primary, secondary, and tertiary settlement tanks either with stationary or traveling bridges, clarifiers, gravity thickeners, or sequencing batch reactor (SBR) systems. The two-part system includes a purpose-built self-cleaning Viper Transducer that uses sonar technology, submersed into the liquid, and detects the echoes from the material. Any distinct change in density is reflected to the transducer – the time taken for the echo to return is transmitted to the controller and the distance to the interface is calculated.

The Sludge Finder 2 offers a wealth of different options depending on the application requirements, including single or dual sensor inputs, installation accessories, communication outputs, and PC Software Suite that offers Sludge Finder 2 software that can be used to record and save all the parameters from your sludge blanket level measurement applications.

• Primary & Secondary Settlement Tanks
• DAF Thickeners
• Gravity Thickeners
• Stationary & Traveling Bridges

General Specifications
Spec: Description:
Weight 1 kg (2.2 lbs)
Cable entry details 10 cable entry knockouts, 5 x M20, and 1 x M16 underside. 4 x PG11 at rear
Operating Temperature (Electronics) -20 °C to +50 °C (-4 °F to +122 °F)
Analog output 2 x isolated (to 150 V floating) output of 4-20mA or 0-20mA into 1 kΩ (user-programmable and adjustable) 0.1% resolution
Digital output Half-duplex RS232
Display 192 x 128 pixel illuminated graphical display showing a variety of screens including echo profile. Fully programmable display options, integral keypad with menu navigation keys
PC Software Sludge Finder PC within PC Software Suite - compatible with XP (service pack 3), Windows 7/8/10
Fuse 2 A slow blow
Operating Voltage Universal 100-240 V AC 50/60 Hz, 22-28 V DC
Power Consumption 20 W maximum power (typically 11 W)
Viper Sensor Specifications
Spec: Description:
Sensor body dimensions 78 mm x 195 mm (3.07 in x 7.67 in)
Sensor body weight Nominal 1.5 kg (3.3 lbs)
Sensor body material Valox 357
Wiper blade - Stainless steel
Transducer cable extensions 4-core screened
Maximum separation 200 m (656 ft)
Enclosure protection IP68
Accuracy 0.25% of the measured range or 10 mm (0.39 in); whichever is greater
Resolution 0.25% of the measured range or 10 mm (0.39 in); whichever is greater
Max range 10 m (32.8 ft)
Min range 0.3 m (0.98 ft)
Minimum sludge density 0.5% concentration
Option: Description:
Communications Modbus
Profibus communications option V1
DX80 radio transmitter
Cable Various cable lengths available
Mounting Sludge Finder 2 Cabinet
Mounting Kits & Brackets available


  • CE Approval
  • ATEX Approval (ST10 Transducer option only)


Sludge Finder 2 Brochure

Sludge Finder 2 Datasheet

Viper Transducer Datasheet

Sludge Finder 2 Manual

Sludge Finder 2 Manual Ul