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Noise Measurement with Maximum Versatility
The Sper Scientific Advanced Datalogging Sound Meter (Model 850013) uses a single range of 30 ~ 130 dB. This dynamic range eliminates the need to manually select and change ranges, alleviating the problem of lost data associated with range changes in auto-ranging models. All test parameters are simultaneously displayed on a large, bright backlit display featuring 0.1 dB resolution and a bar graph. Automatically log up to 31,000 records for later download, or manually save and recall 99 data points with date and time stamp directly on the meter’s LCD. The bi-directional USB port and software enable control of the...
What Are The Key Components and Ways To Save Our Waterways And Fisheries?
Water conservation is a frequently discussed topic in terms of household use, government regulations, agriculture, environmental quality and water management. As the global population increases, it is becoming more critical to manage water resources and the ecosystems that rely on them. An article found on the Science Daily discusses the components of a successful freshwater management plan and nine ways to save our waterways and fisheries. “Humans have put key freshwater ecosystems at risk because of land development and the loss of the vegetation along rivers and streams.” says John Richardson, a professor in the Dept. of Forest and Conservation Sciences...
How Safe Is Your Sushi Rice?
We learned from one of our customers that sushi rice has the potential to become a host for pathogens if not properly prepared. To protect against this, it is imperative that proper amounts of vinegar are added to maintain optimum acidity. To ensure proper acidity levels are achieved, a pH meter should be used to test each batch of rice. A maximum pH reading of under 4.6 is generally considered safe. In many states, there are specific laws in place that state sushi rice pH MUST be between 4.1-4.6. There are two different ways that you can measure the pH...
How Do You Measure Dissolved Oxygen (DO) In Harsh Environments?
Shrimp farmers work in very adverse conditions that impact the chemical make-up of the grow-out ponds. For example, Guatemala is experiencing a drought that has caused what is referred to as the “Child’s Effect” in the shrimp industry. The Child’s Effect causes high temperatures, and increased salinity in the grow-out ponds. Some of these farmers have turned to Sper Scientific to provide rugged, reliable, and accurate field measurement instruments to help them monitor these harsh conditions. They selected the AquaShock ® DO meter (850046K) and the Sper Scientific Optical Salt Refractometer (300006), which are ideally suited for these severe conditions. The water in...
What Is a Refractometer?
A refractometer is a device which measures the content (brix or sugar, honey, urine, salt, battery fluid…) of a solution by the refraction of light. Using an optical refractometer is simply a matter of placing several drops of the sample liquid on the angled prism and sealing the clear plate on top of it. Look through the eyepiece while pointing the refractometer at a source of direct light (do not look directly at the light with the naked eye). The use of a digital refractometer eliminates the uncertainty associated with optical refractometers; a digital refractometer uses an LED light to shine through the sample....
