The 24–7 Nutrient Monitor is a great all around meter for nutrient applications needing constant monitoring. It measures PPM, pH and Temperature and with its large illuminated display it is easy to read from a distance. Calibration screws are conveniently located on the front for easy access. The 24-7 Nutrient Meter has the lowest MSRP of any constant read meter currently on the market. This low price will allow more first time growers to afford the quality and no hassle features of a constant read meter. All 24-7 meters include 4-ounces of buffering /calibration fluid

• Highly efficient and accurate due to its advanced microprocessor technology.
• Hold Function: saves measurements for convenient reading and recording.
• Auto-off function: the meter shuts off automatically after 10 minutes of non-use to conserve batteries.
• Measurement Range: 0-9990 ppm. From 0-999 ppm, the resolution is in increments of 1ppm. From 1000 to 9990 ppm, the resolution is in increments of 10ppm, indicated by a blinking 'x10' image.
• Display: large and easy-to-read LCD screen.
• Factory Calibrated: our meters are calibrated with a 342 ppm NaCl solution. Meters can be recalibrated with a mini-screwdriver.
• Fun, translucent blue housing that's very strong and durable.
• Includes a TDS chart sticker on the back of the meter that explains TDS values.
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Specifications

Range: 0 - 9990 ppm (mg/L)

Resolution: 1 ppm (0-999 ppm); 10 ppm (1000-9990 ppm)

Accuracy: +/- 3%

Power source: 2 x 1.5V button cell batteries (included)

Battery life: Approx. 1000 hours of usage

Dimensions: 15.5 x 3.1 x 2.3cm (6.1 x 1.25 x 1 inches)

Meter weight: 56.7g (2 oz)

Weight with package: 76.5g (2.7 oz)

ON SALE

HM Digital 

AP-1: AquaPro Water Quality Tester TDS (ppm)  

FEATURES

• Measures total Dissolved solids(TDS) and temperature.
• Automatic Temperature Compensation (ATC)
• Water-resistant housing
• Measurement Range: 0-9999 µS
• Digital Calibration (push button)
• Auto-off function, data-hold function and low-battery indicator.
• Display: large and easy-to-read LCD screen includes simultaneous temperature reading.
• Factory Calibrated: The AquaPro is calibrated with a 700 µS solution. The meter can be recalibrated with digital calibration using the push buttons, rather than a screwdriver.
• Includes a cap and batteries
• Comes in a retail-oriented package

 

SPECIFICATIONS

EC Range: 0-9999 µS 
Temperature Range: 0-80 °C; 32-176 °F
Resolution: 1 µS; Temp. resolution is 0.1 °C/F
Accuracy: +/- 2%
Calibration: Digital calibration by push button.
Housing: Water-resistant
Power source: 1 x 3V button cell (included) (model CR2032)
Dimensions: 15 x 2.8 x 1.3 cm (5.9 x 1.1 x .5 inches)
Weight: 42.5 g (1.5 oz)

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PATENTS PENDING

 $38 after tax