Meters & Testing
The pH Control Kit by General Hydroponics includes everything need to check and maintain proper pH for soil or hydroponic gardens. Testing solution reads a wide spectrum from 4.0 to 8.5. Simply fill the test-tube halfway with nutrient, add a few drops of pH Test Indicator, and observe the coloration of the liquid in the test vial. Use the included 8oz. pH Up and Down solutions to correct your pH as necessary.Learn More$11.47
Hanna's latest pH meter is both economical and easy to use! The PH128 GroLine is a pH tester with advanced features for the measurement of pH in hydroponic nutrient solutions. The PH128 is a very simple meter to operate with all functions including turning on/off and calibration are performed with a single button. The PH128 features a replaceable HI1271 pH electrode that can be changed when needed without having to buy a new meter. The PH128 is supplied complete with a carrying case and calibration solutions.
- One button operation
- Replaceable pH electrode
- +/- 0.2 pH accuracy
The GroLine HI98118 pH/temperature tester is our latest pocket meter for measuring the pH of a hydroponic nutrient solution. This modern looking meter is only 0.7" thick and extremely ergonomic, fitting comfortably in your hand. The HI98118 has a very large easy to read LCD display that shows both pH and temperature along with calibration, stability and low battery indicators. All operations are simplified to two buttons. One is for turning the meter on/off and the other for automatic one or two point calibration.Learn More$79.00
The Primo provides a fast and dependable way to measure the Total Dissolved Solids level in your water samples. It is ideally suited for the rigorous demands of water quality professionals, who will appreciate the practicality of the Primos easy-to-read Liquid Crystal Display when demonstrating the before and after results of conditioning and filtration systems. Temperature is compensated automatically to ensure the readings are consistent to the standard or reference temperature. Operating and routine maintenance has never been easier. The Primo TDS uses a single button at the top of the meter. Press it once and the meter is powered and ready for use. Press and hold the button for a few seconds and the Primo automatically enters calibration mode. Simply open a sachet of the calibration solution, dip the probe and within seconds, the meter recognizes the calibration solution and calibrates itself!Learn More$37.00
Works with rockwool and coco coir, too! Excellent and affordable device for reading the "true" nutrient concentration - the concentration in the root zone - which is much more important and accurate than the nutrient concentration in the runoff. It's also a great tool for determining when to stop flushing during or at the end of the flowering cycle.The Soil Test™ Direct Soil EC Tester - HI98331 is a rugged and reliable pocket-sized tester that offers quick and accurate readings. The Soil Test™ Direct Soil EC Tester - HI98331 features a stainless steel penetration probe for direct measurement of conductivity in soils. With a compact size, single button operation, and automatic calibration, Soil Test is an excellent choice for taking direct conductivity measurements in soil.
- 4.5" stainless steel penetration electrode
- Automatic Temperature Compensation
Hanna's newest meter offers the BIGGEST "BANG FOR THE BUCK"! The HI9814 is a slim, lightweight, and waterproof portable meter that measures pH, conductivity (EC), total dissolved solids (TDS) and temperature with a single amplified probe. The meter operation is simplified with two buttons. Advanced features including an selectable EC to TDS conversion factor (0.5 - 500 ppm and 0.7 - 700 ppm).
- 3 in 1 amplified and WATERPROOF probe with pH, EC/TDS and temperature sensors
- Quick Cal Mode to calibrate pH and EC/TDS with one solution - no more using separate 4/7 pH and 1500ppm solutions
- User-adjustable Conversion Factor (CF) selectable between 0.5 (500 ppm) and 0.7 (700 ppm) - meaning you can use just about any brand of calibration solution
HI710025 is a green rubber boot that is custom formed for the HI9814 GroLine portable pH/EC/TDS meter, HI991000 family of portables, and selected portable thermistor based thermometers. A complete lsit of compatible portable meters can be found below. This rubber boot is made of silicone rubber and slides over the meter. Even though all meters are drop tested and designed to resist impacts the HI710025 provides additional shockproof protection. The rubber is able to absorb the shock from an accidental drop.Learn More$35.00
The HI981420 GroLine Monitor for Hydroponic Nutrients provides around-the-clock, continuous monitoring of pH, conductivity (EC & TDS), and temperature in hydroponic nutrients solutions.
Quick to setup, simple to use, this monitor was designed with Hydroponics, Aquaponics, and Greenhouses in mind. Make your nutrient solution easy to manage with the GroLine Monitor.Learn More$389.00
Also check out the new GroPro pH/EC/TDS/Temperature meter. We will most likely be discontinuing the HI 9813-6 and replacing it with the GroPro because it offers more features at a lower cost.
The convenient HI 9813-6 allows you to measure pH, EC (conductivity) and TDS with just one instrument! The specially engineered HI 1285-6 probe is interchangeable and the pH electrode utilizes a cloth junction and gel electrolyte which are particularly suitable when used in fertilizer solutions. This probe has also been designed with Hanna's Fast Response Probe (FRP) technology to allow quicker reaction time to changing conditions. Calibration is reduced to one point in the pH mode, and one point in the EC/TDS mode. EC/TDS measurements are automatically compensated for changes in temperature. The meter has a Battery Error Prevention System (BEPS) which will not allow readings when the battery level is too low for accurate measurements. With all these features HI 9813-6 is an excellent addition to your growing tool chest.Learn More$205.00
When Hanna Instruments introduced it's first version of the pHep (pH electronic paper) in 1986, it immediately revolutionized the standards in pH measurement. Since then, over 1 million pHeps have gone to satisfied customers
around the world. We have always valued your comments and suggestions and in this new series, we have included all the features you have asked for and more!
The waterproof pHep® 4 pH tester has a dual-level LCD that displays pH and °C or °F. At startup, pHep® performs a self check then displays the remaining battery level to assure proper working condition. This tester also features a stability indicator and hold feature to prompt the user when to take the reading & freeze the display for easy and accurate recording. These new pH/Temperature meters have a stainless steel temperature probe for faster and more precise temperature measurement and auto-compensation. 1 or 2 point calibration is made simple with automatic recognition of both standard and NIST buffer sets. Hanna has designed the new pHep® pH electrodes with an extendable reference junction and when the electrode finally is exhausted simply insert a new electrode cartridge!Learn More$88.00
When Hanna Instruments introduced it's first version of the pHep (pH electronic paper) in 1986, it immediately revolutionized the standards in pH measurement. Since then, over 1 million pHeps have gone to satisfied customers around the world. We have always valued your comments and suggestions and in this new series, we have included all the features you have asked for and more!
The waterproof pHep® 4 and pHep® 5 pH testers have a dual-level LCD that displays pH and °C or °F. At startup, pHep® performs a self check then displays the remaining battery level to assure proper working condition. These testers also feature a stability indicator and hold feature to prompt the user when to take the reading & freeze the display for easy and accurate recording. These pH/Temperature meters have a stainless steel temperature probe for faster and more precise temperature measurement and auto-compensation. 1 or 2 point calibration is made simple with automatic recognition of both standard and NIST buffer sets. We have designed the new pHep® pH electrodes with an extendable reference junction and when the electrode finally is exhausted simply insert a new electrode cartridge!Learn More$98.00
This is an updated version of the HI98129. The biggest difference between the existing HI98129 and the Groline HI98131 is that the Groline features the Quick Cal Mode, which allows you to calibrate the pH and EC/TDS with a single solution.
The HI98131 is a slim, lightweight, and waterproof pocket sized meter that measures pH, conductivity (EC), total dissolved solids (TDS) and temperature. The meter operation is simplified with two buttons. One is used for on/off and for calibration while the other is used to switch between the measurement modes. The HI98131 has advanced features including a selectable EC to TDS conversion factor (0.5 - 500 ppm and 0.7 - 700 ppm).
The HI98131 GroLine tester 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 with an accuracy of +/-0.05 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 HI98131 is from 0.01 to 6.00 mS/cm and TDS is from 0 to 3000 ppm using a 0.5 conversion factor. The HI98131 also offers the option to use a 0.7 (700 ppm) EC to TDS conversion factor. An exposed temperature sensor allows for rapid temperature compensated measurements of EC and TDS. The LCD screen has indicators for calibration status and stability. The battery percent level is displayed at start up alerting the user to the remaining battery power that is available. The HI98131 is a versatile pocket meter designed for hydroponics, greenhouse and agriculture applications.Learn More$209.00
The waterproof HI 98129 pH / EC / TDS / Temp Combo Waterproof Tester from Hanna is designed for high accuracy pH, EC/TDS and temperature measurements. At startup, performs a self check then displays the remaining battery level to assure proper working condition. These testers also have a stability indicator and hold feature to prompt the user when to take the reading & freeze the display for easy and accurate recording. Calibration and temperature compensation is automatic.
The HI 98129 is supplied complete with an HI 73127 pH electrode, 4 x 1.5V batteries and electrode replacement tool (HI 73128).Learn More$150.00
The HI 981504 has been designed for continuous and simultaneous monitoring of pH, TDS, and temperature.
Simply install the HI 981504 above the sample to be tested, plug the instrument to the mains and immerse the probes. pH, TDS, and temperature measurements will be simultaneously displayed on three backlit LCDs.
Users can easily select the temperature unit through a switch on the back panel.
The HI 1286 gel-filled pH electrode is provided with a waterproof sheath to protect the BNC connector. The unique design of the electrode provides longer life in aggressive solutions. The HI 7634 TDS probe is easy to clean and requires little maintenance. Measurements are accurate and the meter can be calibrated at one or two points for pH and at a single point for TDS.
Note: This meter may not function properly when used around digital ballasts.Learn More$210.00
Features: Galvanic DO probe. Backlit LCD. Automatic Temperature Compensation. Manual salinity and altitude compensation. Water-resistant.
This unit is unique among our family of DO meters as it is supplied with a galvanic probe. Unlike polarographic probes, galvanic DO probes require no conditioning time. When you need to measure multiple samples in a given period of time, pick it up and measure on demand. HI 9147 is a must have for DO sensitive organisms or high bio-load environments.Learn More$434.00
The Hanna Digital Light Meter has been designed for simplicity of use in taking rapid light measurements. The HI 97500 is provided with a light sensor connected by a flexible coaxial cable which allows remote, stable and optimum position measurement of light, without any interference from the operator. It measures from 0.001-199.9 KLux (1-199,900 Lux) in three ranges. 9V battery and instructions included.
TIP: Plants with high light requirements require from 1,600 Lux to well over 10,800 Lux for proper growth.Learn More$126.95
Sun System� PAR Meter comes with an integrated sensor to measure photosynthetic active radiation (PAR). Sun System� PAR Meter with remote sensor measures photosynthetically active radiation (PAR). Use inside with Sun System grow lights or outside with natural sunlight. Simple and easy to use. Compact size with integrated sensor. 1 year warranty.
This is the replacement electrode for the Hanna GroPro Waterproof Portable pH/EC/TDS/Temperature Meter for Hydroponics (HI9814).Learn More$149.00