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How to Select the Right Viscosity Meter: A Practical Decision Guide for Process and QC Engineers
Viscosity is a deceptively complex measurement. It is not a single number that describes a fluid — it is a relationship between shear stress and shear rate that can be constant (Newtonian) or variable (non-Newtonian) depending on the fluid. And the number you measure depends heavily on how you me...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 -
Acid Mine Drainage and Heap Leaching: Where Concentration Measurement Fits in Mining Hydrometallurgy
The word “concentration” means something different in hydrometallurgy than it does in food and beverage. In a gold heap leach, you are not measuring Brix. You are measuring how many grams of cyanide per tonne of ore, or how many grams of gold per cubic meter of pregnant leach solution. The concen...Read more -
Slurry Viscosity in Grinding Circuits:Why It Matters More Than You Think
Every mining engineer can tell you the target % solids for their grinding circuit. Most can tell you the target P80. Fewer can tell you the target viscosity — and most have never measured it. That is a problem, because viscosity is the variable that tells you whether your grinding circuit is actu...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 -
Ultrasonic Level Sensor vs Float Level Switch: When to Use Each
Level Measurement: Contact vs Non-Contact Level measurement instruments divide roughly into two groups. Contact instruments touch the liquid. Float switches and conductivity probes are in this group. Non-contact instruments measure the level from above the liquid without touching it. Ultrasonic s...Read more
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