EC Meter

These pH and  EC Meter (conductivity indicators) meet a need for continuous control, at a lower cost, with little maintenance.
pH indicator, HI981402: HI1286 plastic electrode (supplied), double junction, with PTFE diaphragm, 2 meters of cable and BNC plug.
Conductivity indicators: each instrument comes with a probe with 2 meters of cable and 1//2” thread for in-line mounting.
For conductivity meters, the probes have a built-in temperature sensor that automatically corrects the temperature.
In measurement mode, a visual alarm can be triggered.
Used in aquariums, agriculture, water treatment or industry.
Robust and waterproof IP67 housing, with fixing eyelet.
The 220/12V adapter power supply is the most suitable for continuous monitoring.
To be ordered with the calibration solutions.

model name: HI 983303 HI 983306 HI 983307 HI 983308
Measuring range: 0 ~ 1990 µS/cm 0 ~ 1990 ppm (mg/L) 0.00 ~ 9.99 mS/cm 0.00 ~ 9.99 ppt (g/L)
Minimum unit of measure: 10 µS/cm 10 ppm 0.01 mS/cm 0.01 ppt
Accuracy (@68°F) : ±2% Full Scale
correction: Manual one-point correction using the front trimmer
Calibration solution: HI 70031P HI 70032P HI 70039P HI 70038P
Temperature compensation: Automatic 5 ~ 50°C (41 ~ 122°F) with ß=2%
Setpoint: 200 ~ 1600 µS/cm 200 ~ 1600 ppm 0.70 ~ 3.50 mS/cm 0.70 ~ 3.50 ppt
Alarm: 100 µS/cm over setpoint outside setpoint by more than ±100 ppm outside setpoint by more than ±0.2 mS/cm outside setpoint by more than ±0.2 ppt
Probe: HI 7634/2 HI 7634/2 HI 7632/2 HI 7632/2
All probes come with 2 m (6.6′) cable and ½” thread for flow-thru mounting
Power supply: 12 VDC external (included)
Use environment: 0 ~ 50°C (32 ~ 122°F); RH 100%
standard: 86 x 94 x 33 mm (3.4 x 3.7 x 1.3″)
weight: 150 g (5.3 oz.)


Mini Controllers:

Laboratory equipment for internal installation of small indicator & controller
piping and similar uses

Traditionally, process monitoring has required significant investments in system design, equipment, maintenance and operation. Our

By introducing the miniature controller, we offer a solution for companies that need to monitor their processes economically.

has been

Hannah’s Gro’Chek and Pronto monitors are easy to use, accurate and continuous for TDS, pH, ORP and EC measurements.

Monitoring is possible. These rigid yet compact in-line equipment can continuously monitor even in harsh environmental conditions.

designed to perform. Hannah’s innovative Gro’Chek and Pronto instruments are specifically designed for the water quality management and hydroponics industry.

was developed for In this trend, these equipments not only improve the system, but also

It had to be extremely tight and accurate. Both the Gro’Chek and Pronto series are designed to withstand high temperatures and moisture.

It is made with a dust/water barrier case. They are also designed to provide an external 12VDC power supply.

This allows continuous monitoring without worrying about battery shortage or replacement. In addition

An alarm function that turns on the lamp when it exceeds the measurement range set by the user has been added, especially to prevent interference with resistance.

A pH electrode is designed to prevent this. The TDS and EC indicators are each capable of automatic temperature compensation. You can also install in-line

For this purpose, you can choose an electrode with an external cable. In a process where monitoring two items at the same time is required,

Use Combo . These instruments monitor pH and ORP, EC or TDS via two separate LED alarm signals.

It’s possible. In swimming pools and hydroponics, setpoints and relays can be adjusted, and pH, ORP,

Choose from EC and TDS small panel controllers.

model name
Alarm LED
Alarm relay
Controller relay
BL 983314    
BL 931700
HI 981401Gro’Chek
HI 981402 Soon
HI 981400 for HACCP
BL 981411
HI 982401 Soon
BL 932700
BL 982411
HI 983301 Gro’Chek
HI 983306 Soon
HI 983308 Soon
HI 983309 Soon
BL 983315
BL 983319
BL 983318
BL 983321
BL 983324
BL 983329
model name
Alarm LED
Alarm relay
Controller relay
HI 983302 Gro’Chek
HI 983303
HI 983307 Soon
HI 983304 Soon
HI 983305 Soon
BL 983317
BL 983313
BL 983320
BL 983322
BL 983327
HI 933700
HI 981406 pH/ORP Combo
HI 981404 Gro’Chek Combo
HI 981405 Gro’Chek Combo
HI 991401 Gro’Chek
HI 993301 Gro’Chek
HI 993302 Gro’Chek
model name pH ORP EC TDS W ATC* Alarm LED Alarm relay Controller relay
HI 7871 water level controller Compact water level controller: Small in size and easy to install.
HI 7873 water level controller Ideal for level control of liquids at distances of 1000 feet (300 meters).



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