Frequently Asked Questions
Have questions about Markland instrumentation for the water, wastewater and process industries?
Here are a few answers that might help you:
What is the range of your Suspended Solids Density Meter in NTUs or JTUs?
The values that you need to measure are for low concentrations of solids and would require a turbidity meter. Our meter measures thicker slurries and starts reading at around 1000 mg/l.
What is the maximum temperature that the Suspended Solids Density Meter sensor can withstand?
The Markland sensor is rated to 50°C or 122°F.
How can I be sure the Suspended Solids Density Meter will work with our sludge or slurry?
We will test your sludge or slurry free of charge. Contact us for details.
Can additional pipe be added to the Automatic Sludge Blanket Level Detector in deeper tanks?
Yes. Additional pipes can be added. In deeper applications, we often recommend the probe be lowered on a flexible hose instead of a pipe. At long lengths, the pipe can be challenging to work with.
Is the front spool of your Sludge Gun® Portable Sludge Level Detector motorized?
No, the spool is not motorized. We have considered it, but the additional cost, complexity, weight and reduced battery life do not make it practical.
Why is pressure significant to the Suspended Solids Density Meter?
Our meter uses ultrasound to measure concentration. Ultrasound “sees” air bubbles as solids. A few bubbles are not a problem but in heavily gassing or aerated slurries, the meter will read high. Pressure in a pipeline will keep these bubbles dissolved or very small, making them virtually invisible to ultrasound. Imagine a soda bottle where a small amount of pressure keeps the bubbles compressed enough that they are not seen.
Can your Suspended Solids Density Meter measure “Total Solids”?
No. Our meter cannot measure total solids. We only measure suspended solids. Total solids is made up of suspended solids plus dissolved solids. Often the amount of dissolved solids is insignificant compared to the suspended solids and can be ignored.