SunnyWhale™ 4-in-1 Pool Water Tester – TDS, EC, Salinity & Temperature

One pen, four readings. The SunnyWhale™ 4-in-1 Pool Water Tester checks total dissolved solids (TDS), electrical conductivity (EC), salinity, and water temperature, so you don't need a drawer full of separate meters. Dip it, read it, done.

• 4 readings in one pen – TDS, EC, salinity, and temperature from a single compact tester.
• Wide range, precise readings – 0–9,999 ppm TDS and salt with 1 ppm resolution, so it covers everything from fresh fill water to saltwater pools.
• Automatic temperature compensation – readings adjust for water temperature from 32.1–140°F, from a spring opening to a hot tub.
• Made for pools & spas – use it in chlorine or bromine pools, saltwater pools, hot tubs, and spas.
• Simple 3-button control – ON/OFF, HOLD/TEMP, and MODE/CAL. HOLD freezes the reading on screen; press and hold HOLD/TEMP to switch between °F and °C.
• Pocket-size and protected – just 3.4 oz, with a cap that covers the sensor between uses.

When to use it
Opening your pool for the season, weekly checks, after topping off with fresh water, or after adding salt or other chemicals.

Pairs well with FinWhale™
FinWhale™ keeps an eye on pH, ORP, and temperature around the clock. This tester covers the numbers it doesn't track—TDS and salt—so you get a fuller picture of your water.

Specs
TDS: 0–9,999 ppm · resolution 1 ppm · accuracy ±4%
EC: 0–9,999 µS/cm · resolution 1 µS/cm · accuracy ±4%
Salinity: 0–9,999 ppm · resolution 1 ppm · accuracy ±2% (0–2,000 ppm), ±5% (2,000–9,999 ppm)
Temperature: 32.1–140°F (0.1–60°C), with ATC
Battery: 4 × LR44 button cells (1.5V)
Size: 7.2 × 1.6 × 0.8 in
Weight: 3.4 oz

Tips
Soak the probe in water for about 2 minutes before first use. Calibrate TDS/EC with a 1413 µS/cm standard solution (sold separately). Rinse with distilled water and replace the cap after each use.

Good to know: This tester measures TDS, EC, salinity, and temperature only. It does not measure pH, chlorine, or bromine.

What's in the box
1 × 4-in-1 water tester
1 × instruction manual