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What is Temperature Testing?

Temperature testing is the process of measuring temperature levels in water. Temperature is a key factor in water chemistry. Temperature affects the dissolved oxygen levels in water, the rate of photosynthesis, metabolic rates of organisms, etc. Aquatic organisms depend on particular temperature ranges for their health. Each species of organism thrives in a specific temperature range, and many animals use temperature as a signal for when to reproduce and when to migrate. If there is an abnormality in temperature this can disrupt the balance of aquatic ecosystems with devastating effect. Water temperature also impacts water density; differences in water temperature and density can cause stratification.


Changes in temperature levels in water can be caused by a wide number of factors, both natural and anthropogenic. Natural causes include weather, groundwater inputs and turbidity. Anthropogenic causes include removal of streambank vegetation that previously provided shade, impoundments (body of water confined by a barrier, such as a dam), discharge of cooling water, and urban stormwater runoff. Using a water temperature monitor can help to detect sources of thermal pollution and ensure the health of aquatic species.

How to use a temperature meter

A water temperature sensor forms an integral part of our multi parameter water testing equipment, because temperature affects so many other processes. It’s often necessary to compensate for temperature when measuring other parameters; our Aquaprobe devices do this automatically.

Temperature levels in water vary with width and depth. It stands to reason that water is warmer in water where the sun’s warmth is able to penetrate. Water that is shaded will be cooler on a sunny day than water that is not shaded. Ideally, the vertical and horizontal temperature profiles of a water body should be determined at least once per sampling site. This is achieved by collecting temperature measurements at varying depths and across the surface of the water. Water temperature probe tests should always be taken at the same place each time.


When to use Aquaread’s temperature meter

Aquaread’s water temperature monitor can be used at any time, but it is important to understand that water temperature fluctuates diurnally, between day and night, and seasonally. Using a water temperature sensor over a period of time allows the user to gain an understanding of these variations in water temperature, and of what is normal for each specific sample site. Knowing what is normal allows for the identification of abnormalities. As temperature affects so many other processes, a temperature reading is taken almost every time water is sampled and investigated.

Aquaread’s temperature testing equipment

Aquaread’s water temperature probe is an electrode that comes as standard on each Aquaprobe and the AquaPlus. The water temperature sensor is capable of measuring temperature in the range of -5 degrees Centigrade to +50 degrees Centigrade (or 23 degrees Fahrenheit to 122 degrees Fahrenheit), with a resolution of 0.1 degree.

Our water quality testing equipment is designed for use in the field. Each of our Aquaprobes are rugged and built to withstand a number of different environments. The Aquaprobe AP-7000 is ideal for long term deployment, and features an in-built self-cleaning mechanism. The Aquaprobe AP-5000 and Aquaprobe AP-2000 are both suitable for either fixed or spot monitoring. These portable devices are ideal for use in the field, as they can be easily transported between sample sites. The AquaPlus is a handheld device that is a combined optical DO, EC and water temperature sensor.