Suspended Solids Density Meter

Suspended Solids MeterThe Markland Advantage:

Easily monitor the density of sludges and slurries

  • Get linear readings of the  percentage of suspended solids.

Control sludge thickening

  • Automatically shut off the desludge pump, before sludge becomes too thin.

Continuously monitor the solids flowing in a pipeline

  • Know percentage of suspended solids to determine solids mass flow.

Use a product that does not require permits or approvals

  • Read sludge concentrations with inherently safe attenuation of ultrasound.

Reduce the amount of polymers used in dewatering processes

  • Control polymer / chemical dosage by monitoring particulate concentrations.

Reduce energy and emission costs

  • Ensure wastewater sludge is optimum density for feeding to digesters, belt presses and centrifuges.

Ensure meters will work in your sludges and slurries

  • Samples tested free of charge

Get answers when you have questions

  • Technical assistance is direct from the designers and manufacturers.

Applications


Markland’s Suspended Solids Density Meter is useful wherever you can benefit from monitoring the concentration of particulates in fluids:

  • Municipal wastewater treatment plants, to measure primary, secondary and return-activated sludge (RAS) concentrations
  • Industrial slurry concentrations, to analyze sludge density
  • Industrial wastewater, to control desludge pumping
  • Manufacturing processes
  • Clarifiers
  • Open-top tanks
  • Pipelines
  • Power generation plants
  • Food processing plants
  • Mineral processing
  • Chemical processing
  • Petrochemical and pharmaceutical plants
  • Mining
  • Drinking Water Treatment Plants (to measure backwash sludge concentration from sand or membrane filters, before it is sent for further processing)

The Markland Suspended Solids Density Meter has been successfully used in or tested with the following:

  • Iron Ore Slime
  • Metal Hydroxide Sludge
  • Iron Ore
  • White Water
  • Polystipple
  • Flyash
  • Return Activated Sludge (RAS)
  • Sugar Cane Slurry
  • Talc
  • Aqueous Ammonia
  • Garnet Powder
  • Backwash Filter Sludge
  • Power Plant Sludge
  • Paper Mill Effluent
  • Clay & Silica
  • Sodium Hydroxide Sludge
  • Serium Oxide
  • Ponce Powder
  • Aluminium Oxide
  • Drinking Water Plant Lime Sludge
  • Magnesium Hydroxide
  • Kaolin Clay
  • Resins
  • Calcium Hydroxide
  • Lime Slurry
  • Rubber Latex
  • Metal Finishing Sludge
  • Ceria
  • Fumed silica
  • Powdered Coal
  • Primary Sludge

Concentration Meter Installation
Inline Density Meter Installation

 

Features

Features

  • not affected by colour of fluid or particulates
  • measures slurry concentrations too thick for optical methods
  • easy set-up and calibration
  • safe ultrasonic sensor is non-radioactive, so approvals/permits unnecessary
  • non-clogging, smooth-bore, non-intrusive sensor is low maintenance (no protruding parts that could entangle material in the flow, so requires little cleaning)
  • ultrasonic self-cleaning (no optics to foul)
  • can be supplied as an in-line spoolpiece or throw-in style probe
  • automatic dynamic damping, to prevent widely fluctuating readings

NOTE:The Suspended Solids Density Meter cannot be used in aerated or heavily-gassing slurries.

 

How it Works

Markland’s Suspended Solids Density Meters use the attenuation of ultrasound to measure the concentration of sludges and slurries that are too thick for optical methods. Markland’s Meters operate in the region between TURBIDITY METERS and NUCLEAR GAUGES.

Ultrasound Concentration Range

 

Ultrasonic Density Meter

 

Demonstration

This animation demonstrates how the Markland Suspended Solids Density Meter works.

The sonic pulse passing through clear water returns a strong echo and the meter reads zero.Density Monitor in Water

Suspended solids absorb some of the sonic energy making the echo weaker and the meter reads the percentage suspended solids of the slurry.

Density Monitor in Slurry

 

Tech Specs


Technical Specifications

Range 0.1% (1000 mg/L) to 15% (150,000 mg/L) approximate. We have measured some concentrations up to 80%SS. Exact range varies in different materials due to variation in sonic attenuation. Contact factory for engineering assistance or NO CHARGE testing of your particular slurry.
Accuracy ±1000 mg/L to 5% of full scale (depends on sonic attenuation of particular sludge)
Linearity Varies in different materials. Maximum non-linearity at mid-range is usually within
of 5% of full scale reading
Power 110/120 VAC, 220/240 VAC, 50/60 Hz (advise with order). 15 watts
Temperature Liquid: 1°C to 45°C     Controller: 20°C to 50°C
Pressure 60 p.s.i.g. (4bar) 400 kpa
Outputs
  • Liquid Crystal Display (LCD) 2×20 Digit Alphanumeric
  • 4 – 20 ma output signal, linear with %SS.
  • Two DPDT, 5 Amp Relays, independently adjustable set-points
  • RS – 232 Serial Port
  • RS – 485 Serial Port (Optional)
Calibration Pushbutton Automatic in water (zero) and in known %S.S. concentration
Damping Automatic Variable Dynamic Damping
Response Time 30 sec. to 1 min. (max.) depending on homogeneity of slurry
Cable(s) 15 metres (50 feet) coaxial cable pigtail(s)
Enclosure NEMA-4X (IP-67)
Width 343mm (13 1/2″)   ·   Height 229mm (9″)   ·   Depth 200 mm (7 7/8″)
Dimensions & Materials
MODEL 502-IL MODEL 502-TP
Flanged steel spoolpiece pickup head, overall length 458mm (18 inches).Flange type and pipe diameter to suit pipeline PVC probe cage head with stainless steel trim, 150 mm (6 in.) offset from vertical
mast. 1 inch Sch. 80 pipe mast x 4 metres (12 feet) long supplied with
two stainless steel mounting clamps.
Approvals

 

Request Quote

To receive a quote for a Markland Suspended Solids Density Meter, please complete the form found below.

Contact Information
Name:* First
Last
Title:
Organization:
Address: Line 1:
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City: State/Prov:
Country: Posta/ZIP Code:
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Please let us know how you heard about Markland Specialty Engineering.
 Industry Magazine Directory or Buyers Guide Search Engine Trade Show Association Newsletter Referred by a Colleague/friend Other:
Your Requirements
Describe the slurry or sludge which requires suspended solids density measurement:  Primary sewage Secondary Sewage Sand/Clay/Silt Liquid is water Industrial sludge Other - specify:
If Industrial sludge, list the predominant chemicals:
Are there bubbles in the liquid?  Yes No
Maximum solids concentration:  PPM mg/L (10,000 PPM=1% S.S.)
Accuracy required (if known): ±  PPM mg/L
Maximum temperature of liquid:  °C °F
Pressure:  psig bar Kps
pH:
Power Available:   120/60 220/50 240/50 Other Specify:
Coaxial cable length required:  Metres Feet
from Probe to Controller (50ft/15m is standard)
Pick up head style required:  Throw-in probe - Model 502-TP Inline pipe spoolpiece - Model 502-IL
if inline, specify pipe size:
Number of suspended solids meters required:
Other comments or needs:

 
 

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