Inline Density Measurement
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Density Meter Troubleshooting: A Symptom-Based Field Guide for Maintenance Engineers
The density meter is reading wrong. That is all you know. It could be a sensor problem, an installation problem, a calibration problem, or a process problem — and the reading does not tell you which one it is. This guide is organized by symptom, not by component. When the meter is giving you a pr...Read more -
How to Select the Right Density Meter: A Decision Guide for Process Engineers
Every month we get an inquiry that goes something like this: “We need a density meter. Can you send a quote?” Our first response is always the same: “What are you measuring, what is the fluid, and what do you need the data for?” Nine times out of ten, the buyer has not thought through those three...Read more -
Slurry Density Measurement in Mining:Three Decisions That Determine Your Circuit Performance
The hydrocyclone is one of the most misunderstood pieces of equipment in mineral processing. Operators watch the overflow and underflow. They adjust the feed pump. They watch the pressure gauge. They rarely watch the density. That is a mistake, because the single most important variable for class...Read more -
Why Brix Is Not Brix – HFCS, Sucrose, and the Measurement Problem in Food and Beverage
Here is a conversation we have had more than once. A food processor specifies an inline Brix meter for their HFCS blending line. The specification says “Brix measurement.” The instrument selected is a refractometer. The reading comes out. The lab measures the same product with a pycnometer and ge...Read more -
Where Density Measurement Actually Happens in a Refinery
Every refinery engineer knows that density matters. Crude oil pricing is by API gravity. Product quality is tied to density. Blending is controlled by density. But if you ask where exactly inline density measurement changes how the plant runs, the answers are more specific than the textbooks sugg...Read more -
Density Measurement in Pharmaceutical Manufacturing
Regulatory requirements, process control, and where inline density fits in a GMP environment A FDA inspection finding from a few years ago: a liquid pharmaceutical manufacturer was controlling syrup concentration using periodic lab samples. The last sample before a batch release was 48...Read more -
Density Meter vs Concentration Meter
What is the difference — and why it changes how you specify By LONNMETER Technical Team · Process density & concentration instrumentation A customer called us last month. They were specifying instruments for a sulfuric acid dilution skid. “I need a density meter and a concentration meter,”...Read more -
Temperature Compensation in Inline Density Measurement
The Temperature Problem Is Bigger Than You Think Here is a number that surprises most engineers: a temperature change of 10°C changes the density of water by about 0.002 g/cm³. For most organic liquids — acids, solvents, oil products — the effect is three to five times larger. A density meter wit...Read more -
Density and Viscosity Measurement in Lubricant Quality Control
Why Lubricant Quality Comes Down to Two Numbers Lubricant specification sheets list a dozen properties: flash point, pour point, TAN, water content, ash content, and more. But in the blending process itself, the two numbers that tell you whether the batch is right are density and viscosity. Every...Read more -
Why Density Meters Drift Over Time and How to Minimize It
Drift Happens — The Question Is How Much and Why A density meter that was calibrated last month does not stay calibrated forever. Over time, the reading shifts. That shift is called drift. Some drift is unavoidable. Some drift is preventable. Knowing the difference is what separates a meter that ...Read more -
Density Meter FAQ: 15 Questions Engineers Ask Before Buying
We get these questions from engineers every week. Some are about accuracy. Some are about installation. Some are about whether a density meter is even the right instrument for the job. If you are specifying a density meter and have questions, chances are your question is in this list. Q1: What a...Read more -
Density and Concentration Measurement in Sugar Processing Industry
Sugar Processing Is a Density Story from Start to Finish Walk through a sugar mill and every process step changes the density of the material. From the dilute mixed juice coming out of the mill to the thick syrup feeding the pans, concentration increases steadily. If you want to know where you ...Read more
