Function and Applications

The Cobra4 Sensor-Unit pH and 2 x temperature NiCr-Ni is a
measuring recorder for pH, potential and temperature measurements,
which is controlled by micro-controller.

Benefits


It can be fitted with two NiCr-Ni thermoelements (Type K) and a
pH probe or redox measuring chain



Measure up to two temperatures and one pH or potential value
simultaneously.

Discover new experimental possibilities especially in
thermodynamics



Values of the calibration are saved in the sensor - no
need for new calibration.

The sensor is not restricted to the measurement of pH values:
Connect the redox electrode 46267-10 to measure redox
potentials.

The unit can be connected to the Cobra4 Wireless-Link, the
Cobra4 Mobile-Link or the Cobra4 USB-Link using a secure and
reliable plug-in/lockable connection.


Equipment and technical data


Temperature:


Measuring range: -200..+1200 °C

Resolution: 0.1 K

Measuring accuracy: equal to the accuracy of the gauges
used


pH:


Measuring range: 0...14

Resolution 0.01K

Measuring accuracy: ± 0,5%


Potential:


Measuring range -2000..+2000 mV

Resolution: 0.1 mV

Measuring accuracy: ± 0.5%



Data flow rate: 5 Hz

Dimensions: approx. 62 mm x 63 mm

Weight: 95 g


Accessories

For the measurement of temperature, pH-value and potential the
following accessories are needed:

Temperature:


Thermocouple NiCr-Ni -40...+500°C single type, 13615-02
or Thermocouple NiCr-Ni -50...+1100°C microsheath, 13615-01
or Immersion probe NiCr-Ni -50...+1000°C stainless steel,
13615-03
or Immersion probe NiCr-Ni -50...+300°C Teflon,
13615-05
or Surface probe NiCr-Ni up to +1000°C stainless
steel, 13615-04


pH/potential:


pH electrode, plastic, gel-filled, 46265-15
or pH electrode, plastic, refillable, 46266-10
or pH electrode, plastic, refillable, 46266-15
or pH electrode, glass, refillable, 46268-10


Potential:


Platinum redox electrode, plastic, gel-filled, 46267-10