The Bluelab EC Pen and Bluelab ppm Pen are the latest innovation for hand held conductivity meters and the ultimate handy solution for measuring conductivity.
Hydroponic growing lets you give the best care possible to your plants. The quality of care is in your control.

The Bluelab EC and ppm pens measure how much food the plant has available. You have the option of either the Bluelab EC Pen or the Bluelab ppm Pen.

The Bluelab EC and ppm pens provide a compact, quick and handy way to manage the success of your crops to ensure they have the nutrients they need.

The Bluelab pH Pen is the latest innovation for hand held pH meters and is the ultimate handy solution for measuring pH.
Hydroponic growing lets you give the best care possible to your plants. The quality of care is in your control.

The Bluelab pH Pen provides a compact, quick and handy way to manage the success of your crops to ensure maximum uptake of nutrients.

Measures pH and temperature
Selectable units for ˚C & ˚F
Backlit LCD display
Double junction probe (not replaceable)
Successful calibration indicator
Hold function
Low battery warning
Fully waterproof

This instrument is designed to be extremely accurate, fast and simple to use in diverse water quality applications. Advanced features include the ability to select from 3 different solution types that model the characteristics of the most commonly encountered types of water; proprietary temperature compensation and TDS conversion algorithms; highly stable microprocessor-based circuitry; user-intuitive design; and waterproof housing. A true, one-handed instrument, the PT1 is easy to calibrate and easy to use. To take a measurement, you simply press a button then dip the pen in solution.

  HI 9813-6N is a versatile, water resistant multiparameter portable meter specifically designed for agricultural applications such as hydroponics, greenhouses, farming and nurseries. It features an extra large LCD that clearly displays the parameter being measured as well as calibration instructions. Calibration is fast and easy with knobs located on the front panel of the instrument. HI 9813-6N is designed for simplicity of use in taking pH, mS/cm, ppm and temperature in the

Automatic temperature compensation.
Waterproof, dust proof housing that floats.
Easy to use; push-button calibration with auto buffer recognition.
Includes transparent electrode cover/sample cup.
Range: 0.0 to 14.0 pH.
Low-cost pocket sized meter.
Push-button calibration, HOLD function, and error messages.
Power: four 1.5 Volt button cell batteries (included).

Economical, pocket-sized meter
Waterproof, dust proof housing that floats
Easy to use; push-button calibration with auto buffer recognition
Includes transparent electrode cover / sample cup
Push-button calibration, HOLD function, and error messages
Range: 0.0 to 14.0 pH
Power: four 1.5 V button cell batteries (included)

• Ideal for commercial use. Includes a carrying case with belt clip.
• 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.
• Built-in digital thermometer
• 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.
• Also available in "x 10" mode: reads in increments only of 10 ppm (0-9990 ppm).
• 3 year warranty.

• Measures total dissolved solids (TDS) and temperature.
• Automatic Temperature Compensation (ATC)
• Water-resistant housing
• Measurement Range: 0-5000 ppm
• 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 342 ppm NaCl solution. The meter can be recalibrated with digital calibration using the push buttons, rather than a screwdriver.
• Includes a cap and batteries.
• One year warranty.

Waterproof pH tester with 2 point manual calibration, 0.1 pH accuracy, range: 0.0 to 14.0 pH, replaceable MA73600 pH electrode with battery technology providing 1500 hours of battery life.