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GRYF 158 - Conductivity meter, pH meter, thermometer

Processor handheld meter for conductivity, pH and temperature measurement.
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Processor handheld meter for conductivity, pH and temperature measurement.

GRYF 158 is a microprocessor-controlled, battery-operated measuring instrument. The device is designed to measure the specific conductivity of solutions, pH, electrical voltage and temperature. Its ergonomic shape allows one-handed operation, so it is suitable not only for laboratories, but also for field work and operations. The device is controlled by four buttons that are similar to the PC: use arrow keys, UP, DOWN, ESC, ENTER. The multifunction display (LCD) clearly displays all measured variables and other accompanying data and messages. The display shows the main measured value (conductivity, pH or mV) and the accompanying temperature variable.



The conductivity and pH measurement function is equipped with automatic temperature compensation (ATC), ie. when measuring conductivity or pH, the temperature used to calculate the resulting displayed value is measured at the same time. The Auto Temperature Compensation feature can be turned off.

The four-wire conductivity cell with an integrated temperature sensor ensuring accurate measurement across all five ranges is standardly used to measure conductivity. The temperature compensation for conductivity can be selected according to the known temperature dependence of the measured sample in the range of 0 to 3% / °C or according to the dependence given in EN27888 for natural waters.

Any combined pH electrode can be used to measure the pH.

The ORP or other ISE measurement electrode may be connected to mV-meter input. 

If the device is equipped with a voltage output, the measured data can be transferred to another device (eg a recorder).

The device is powered by a 9V battery. A drop in its voltage is indicated by the "Bat" message. The automatic shutdown is set to 5 minutes. The auto power off function can be turned off. 



Conductivity measurement range0.00 µS – 200.0 mS
(five aut./man. switched ranges) 
Conductivity measurement accuracy0.5% ± 1 dig
Thermal correction constant0.0 – 3.0
Thermal compensationautomatic  0 – 100 oC
PH measurement range, resolution– 14 pH; 0.01pH
Accuracy of pH measurement±0.01 pH ±1 dig.
Input resistance for pHl012W
Measuring range mV, resolution±1500 mV, 1mV
Measuring accuracy mV±1mV ±1 dig.
Temperature measurement range, resolution-50 – 200 oC;  0.1 oC
Accuracy of temperature measurement±0.2oC ±1 dig
Temperature sensorNi 1000, 6180 ppm
Voltage output1dig = 1mV
Power supply9V, battery type 6F22
Battery life200h (continuously)


GRYF HB, spol. s r. o. is a manufacturer of multi-functional measuring instruments used for measuring electrochemical and physical values such as pH, temperature, conductivity, oxygen, redox potential.

Where to find us

GRYF HB, spol. s r.o.
Cechova 314, 580 01 Havlickuv Brod

Na Tisine 1396, 580 01 Havlickuv Brod

Opening hours: Mon-Fri 7:00 -- 15:30


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+420 569 425 024
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