Meters

Gardeners can easily measure and maintain nutrient strength levels with the waterproof Truncheon. Truncheon reads in EC (0.2-3.6), CF (2-36), and TDS in both 500 and 700ppm scales (100-2520). Accurate within ± 4% of reading with a resolution of .1 EC, the Truncheon runs on three AA alkaline batteries and comes with a five-year manufacturer's guarantee.

The Bluelab pH Pen is a handy option for hobby and small scale hydroponic growers. Maintaining proper pH levels is key in raising healthy, fruitful plants, and this pen accurately measures both the pH and temperature in your hydroponic system. It also features selectable units for ˚C and ˚F, a backlit LCD display, double junction probe, successful calibration indicator, hold function, low battery warning, auto off function, automatic temperature compensation, and is fully waterproof. This pH Pen has a range of 0.0 – 14.0 pH and 0-50 ˚C or 32-122 ˚F, and an accuracy to ±0.1 pH. It requires one AAA battery (not included), and has a 12 month manufacturer’s warranty

The Bluelab ppm Pen measures conductivity and temperature and is a great way to ensure plants are receiving the proper amounts of nutrients. This pen features a backlit LCD display, optional calibration and a successful calibration indicator, a hold function, low battery warning, auto off function, automatic temperature compensation, and is fully waterproof. It operates in units of 500 or 700 ppm and has a range of 0-5000 ppm or 0-7000 ppm, and accuracy to ±50ppm or ±70ppm. Requires one AAA battery (not included) and has a 12 month manufacturer’s warranty.

It's all you need for simple and reliable crop management and it's all within arm's reach! The Bluelab Combo Meter is a conductivity, pH and temperature meter all in one. The Bluelab pH Probe and the Bluelab Conductivity/Temperature Probe are simply placed into the solution and the selected reading is displayed on screen. As the Bluelab Combo Meter is portable and does not require a power supply to operate, it can be used anytime and anywhere to help you manage your crops daily nutrient requirements. Calibration of the pH is simple with the push buttons on the meter and fresh calibration solutions. Conductivity and temperature do not need to be calibrated as this is locked in during manufacture. Display options available in °C, °F, EC, CF, ppm 500 and ppm 700. Features • Lightweight and portable • Large easy to read display • No calibration required for conductivity and temperature • Successful pH calibration indicator • Replaceable double junction pH probe • Low battery indicator • Simple push button pH calibration • Battery operated • Auto off function

The pH HydroTester is a reliable pH meter that is ideal for testing applications such as hydroponics and gardening, pools and spas, aquariums and reef tanks, water ionizers, drinking water and more. The sleek, lightweight design is water-resistant, features one-touch automatic digital calibrations, measures temperature, has automatic temperature compensation (ATC) and a large LCD screen. This tester includes storage solution in a sponge embedded in a translucent cap, pH7.0 buffer and batteries. This product carries a one-year warranty.

The EC/TDS HydroTester is a reliable EC/TDS meter that is ideal for testing applications such as hydroponics and gardening, pools and spas, aquariums and reef tanks, water ionizers, drinking water and more. With four scales, including microsiemens (µS), millisiemen (mS), parts per million (ppm) and parts per trillion (ppt), this water-resistant tester is excellent for nutrient testing and the easy-to-read LCD screen includes simultaneous temperature reading. Measurement ranges from 0 to 9,990 µS, 0 to 5,000 ppm, 0-9.9 mS and 0-5.0 ppt. This product includes a protective cap and batteries and carries a one-year warranty.

The Bluelab Guardian is a constant indicator of the desired levels of EC, pH and temperature, allowing these parameters to be optimized as the crop progresses through each growing phase. A flashing display indicates if one parameter moves away from the desired level, allowing gardeners to make the required adjustments quickly. The Guardian monitors crops 24 hours a day with a built-in alarm system, and also features large, easy-to-read displays with adjustable "Plant Safe" green LED lights, adjustable conductivity and temperature values, push-button pH calibration, a silent alarm for both high and low settings, setting retention even during power failure, automatic temperature compensation, and a water-resistant design. The meter ranges are pH from 0.0-14.0 with a 0.1 resolution, EC from 0.00-5.00 with 0.1 resolution, and temperature from 32-122°F (0-50°C) with 1° resolution. The accuracy is ± 0.1 for pH and EC, ± 2°F (± 1°C) for temperature. Protected by two-year manufacturer's warranty.

Displays TDS levels of the feed water and product water with in & out electrode probes. Highly efficient and accurate due to its advanced microprocessor technology. Auto-Off function conserves battery power. The unit shuts off automatically after 10 minutes of non-use. Dual Range 0-9990 ppm (From 0 - 999 ppm the resolution is 1 ppm. From 1000 to 9990 ppm, the resolution is 10 ppm, indicated by a blinking 'x10' image.) Factory Calibrated: our meters are calibrated with a 342 ppm NaCl solution. Meters can be recalibrated with a mini-screwdriver. Comes equipped with John Guest Quick-Connect T-fittings as shown. Installs quickly and easily. Comes standard with 1/4" fitting size. Range: 0-9990 ppm Accuracy: ±2% Cable Length: 24.5" (including sensor) Fittings: 1/4" standard Power source: 2 x 1.5V button cell batteries (included) Battery life: approx. 1000 hours of continuous use Size: 7.6 x 2 x 4.7 cm (3 x .8 x 1.9 in.) Weight: 79.4 g (2.8 oz.)

The HI9814 digital pH and ppm meter features a large multi-level  LCD which displays both pH, EC or TDS and temperature readings simultaneously. The pH readings are displayed with a 0.01 resolution and an accuracy of +/-0.01 pH while the EC and TDS readings are displayed with a 0.01 mS/cm and 10 ppm (mg/L) resolution and 2% full-scale accuracy. The EC range of the HI9814 is from 0.00 to 6.00 mS/cm and TDS is from 0 to 3000 ppm using the 0.5 conversion factor. The EC to TDS conversion factor is selectable 0.5 (500) and 0.7 (700 ppm). A built-in temperature sensor allows for automatic temperature compensated measurements of EC and TDS.  The HI9814 has many advanced features that are found in more expensive portable instrumentation including automatic calibration, buffer/standard recognition and temperature compensation. The LCD screen has indicators for calibration status and stability, as well as on-screen tutorial messages. The battery percent level is displayed at start up alerting the user to the remaining battery power that is available.  The supplied HI1285-7 is a  polypropylene body, amplified pH electrode with a built-in EC/TDS and temperature sensors. The amplifier for the pH electrode prevents interference from humidity and sources of electrical noise include circulating pumps, motors, and ballasts for grow lights. The HI9814 is a versatile ppm meter designed for hydroponics, greenhouse, and agriculture applications.

Simplified one button calibration

One or two point pH calibration is automatic to a pre-programmed buffer set (4.01, 7.01 and 10.01) or single point pH and EC calibration with the Hanna Quick Cal calibration solution. To perform a quick cal calibration, simply press and hold the left power/mode button while in measurement mode for three seconds and let go to enter calibration mode. Once both pH and EC are calibrated "CAL OK" is displayed and the meter returns to measurement mode.