As it is, pools are ideal for recreational and leisure activities – no matter what the season is.
Therefore, it is also important to keep it at optimum temperature levels which will be suitable and safe for users. To monitor water temperatures accurately, you need to have a thermometer fit for your pool. We have listed some products to help you choose the best pool thermometer.
How Temperature Affects Pool Water Quality
It is important to keep the temperature of swimming pools at optimum levels all the time. Aside from ensuring pool users are comfortable while swimming, you also need to keep them safe and healthy.
The warmer the pool water is, the more likely it will become a thriving environment for bacteria and it can also affect the balance of the pool water chemicals. As such, if your pool is treated with chlorine, it may quickly run out (consumed) as the bacteria proliferate.
It can also cause some health problems such as dehydration, muscle cramps and body overheating.
On the other hand, if a swimming pool is too cold, it can worsen the condition of those who have heart problems and may even affect those who have a clean bill of health.
In addition, the seasons change, thus require the need to monitor the temperature.
Whenever necessary, the pool temperature may be adjusted before usage.
Optimum Water Temperature Levels
For reference, the ideal pool water temperature should range between 78° to 82° F (25-28°C). However, the pool can be kept cooler at around 29° C for leisure and 30° C for children’s use.
Swimming Pool Thermometers
The swimming pool thermometers are commonly classified into two types: Analog Pool Thermometers and Digital Pool Thermometers.
Analog Pool Thermometers
These are thermometers which have the conventional mercury strip that rises or falls relative to the temperature of the surface that it measures.
The mercury strip rises with increasing temperature but falls with decreasing temperature. It stops on a particular level which then indicates the current temperature.
Digital Pool Thermometers
These are thermometers which automatically read the water temperature in the thermometer’s display console.
They usually have a sensing probe which is submerged in the water whose temperature is then indicated in the digital thermometer.
Other digital thermometers have a dedicated apparatus that can be left in the pool water whose temperature is indicated in a separate receiver. These are the remote pool thermometers such as the Bluetooth and Wi-Fi pool thermometer. They work on up to 100 m away.
More advanced remote thermometers use an Android/IOS app instead of or in addition to physical wireless receivers which then allows you to know the temperature at farther distances.
When choosing a pool thermometer, you can also choose whether you’d prefer a hanging or a floating thermometer.
The hanging pool thermometer usually has a string which can be tied in the pool ladders or other suitable place in the pool area to submerge the thermometer a few inches or meters below the water surface.
On the other hand, floating thermometers as you may expect, stay only on the water surface.
Pool Thermometer Comparisons
Generally, digital thermometers are equipped with more advanced sensors which can thus provide a more accurate reading.
They are also made up of more durable materials which can resist the effects of the pool chemicals and other factors in the temperature readings.
However, you can expect them to be more expensive to compensate for the quality it has.
Moreover, analog thermometers usually last longer than the digital ones since they don’t use electronic sensors which deteriorate through time.
Floating thermometers may be more convenient to use since you can simply place them in water then remove them after use to check the temperature reading.
However, they are less accurate than the hanging thermometers since they only stay at the surface.
Thus, hanging thermometers are more reliable.
Other Considerations when Checking Pool Water Quality
When you want to get the best pool thermometer, also consider the following:
- Check if the instrument is properly calibrated.
- Choose a thermometer that will alert whether the temperature exceeds above or below if you want to keep a pre-set temperature level for the pool.
- You may have to check the temperature few times a day especially during a change of weather.
- You may also prefer those thermometers with additional accessories such as built-in pool alarms whenever the pool is in use. This is especially useful to ensure children’s safety.
Aside from the frequent monitoring of temperature, it is also important to consider pool safety and water quality.
To keep the pool from the access of children, you may install a pool fence in addition to pool alarms.
Lastly, ensure proper pool chemical balance. There are pool test kits that are available in the market to help you assess the water quality of your pool.
Pool Thermometer Reviews
1. Ambient Weather WS-14 Pool and Spa Thermometer
This is another wireless and a floating pool and hot tub spa thermometer with a separate receiving unit that can monitor readings from up to 8 water sensors.
Aside from measuring pool and spa temperature, it can also record indoor and outdoor temperatures.
In the scroll mode, the readings on each channel are displayed on the console every 5 seconds. Meanwhile, the individual temperature readings are updated every 60 seconds.
- Large operating distance range (up to 300 feet or around 90 m in open space)
- Eight channel-switch
- Optional calibration function
- The sensors are re-synced when transmission is interrupted
- Energy saver (it is also solar powered)
- Leak-free, water-resistant design
- The in-pool unit is not rust-proof
2. MILLIARD Floating Pool Thermometer
It is a 7-inch tall, floating pool thermometer that has both the Fahrenheit and Celsius scales. It comes with a floating animal (bear, fish, duck, etc.) design on the top which floats upright and thus is more convenient to read. Like most thermometers, it can also be used to measure the temperature in spa, tubs, Jacuzzi, etc.
The thermometer is also equipped with a rope which you can tie to the pool ladder or any other suitable area to keep it from floating away. Hence, you will only need to stay in the same place to read the temperature.
- Children-friendly design
- Convenient to read
- It may be hard to read the temperature (the strip is too small)
- String may need regular replacement
3. eLander Pro Water Thermometer
It is an analog, floating water thermometer which has both the Fahrenheit and Celsius scales. It can read temperatures up to 120° F (or 50°C).
You can use this for indoor or outdoor pools, spa, tubs, aquariums, and even in fish ponds. It also has a string which you can tie to the pool ladders to keep it from floating away.
- Convenient to read (large temperature scale display)
- Liquid indicator may be too thin for accurate temperature reading
- Doesn’t float upright
4. Yowosmart Wireless Pool Thermometer
This wireless pool thermometer uses a separate in-pool unit and a receiving unit that has an LCD display.
Aside from recording the temperature in the pool, it can also check the temperature in the spa and tub (0 to 50° C water temperature range).
It conveniently indicates the indoor temperature (0 to 60° C temperature range), as well as the date and time when the temperature recording was done. The data is updated every 30 seconds.
- Built-in alarm system
- The receiving unit can record water temperature from up to 3 different locations.
- Energy saver (since it is also solar powered)
- Large operating distance range (up to 100 m in open space)
- Enables user to set maximum and minimum pool temperature for monitoring
- Sometimes, it takes time to get the Bluetooth connectivity working
5. Ivation Bluetooth Water Thermometer
You can pair this with an Android or IOs device to indicate temperature readings via its own dedicated app. This works on devices which have Bluetooth version 4.0.
- Has an alarm option to alert you whenever a user-set temperature is reached or exceeded
- It auto-pairs with your device when it is in range
- The operating distance range is quite short
- Significant temperature reading difference (3-4° C)
Among these products which we have reviewed, the best pool thermometer would be Ambient Weather WS-14 water thermometer. Despite its more expensive cost, it does have a lot of features which make it extra useful.
Compared to other wireless digital water thermometers, this can be manually calibrated for more accurate readings and the sensors can be re-synced whenever transmission interruption occurs. Thus, it can also provide more accurate readings over a large distance range.
Moreover, it can also read the temperature from up to 8 different sensors at different locations with a short update rate of only 60 seconds. It also simultaneously displays the indoor temperature as well as the current date and time.
As it is important to keep the water temperature on optimum levels, this device can really be helpful as it can notify the user whether a set temperature range (maximum and minimum) is reached or exceeded.
With this, the user may adjust the temperature (heating system) quickly without having to check the water temperature from time to time.
For the features it has, the price is just worth it.