DT035
Sensor Sheet
Type:
Conductivity Sensor |
Detection Range:
0 - 20 mS
|
Sensor Description:
The DT035 is designed to measure conductivity of liquids
and solutions. It can detect conduction between 0¸20 mS (Millisimens). The DT035
is composed of a conductivity electrode with a connecting wire, and an egg-shaped
adapter.
How it works:
Inside the conductivity electrode there are two platinum
plates being situated on a glass base. The distance between the plates is fixed,
and so is their size. When electric current travels to one plate, and the
electrode is placed in a liquid of some conductance, the second plate will
receive some of that current and the solution between the plates will act as a
resistor. The voltage on that "resistor" is measured and adjusted to a range of
0-5 V, accepted by the analog-digital converter of the Data-Logger. The result
is then stored into the Logger's memory.
Calibration:
The DT035 has a simple calibration mechanism for more
accurate measurements. In the back of the egg-shaped sensor case you will find a
small hole. In order to calibrate the sensor you will need a reference
conductivity value (a solution of known conductivity). Insert the electrode into
the solution, then start a data recording. Insert a flat screwdriver into the
calibration hole and slowly turn it until the measured value is exactly the same
as the reference value. The sensor is now calibrated.
What is it used for:
The DT035 is used for various experiments in biology and chemistry. By using
the DT035 you can demonstrate changes in conductivity when dissolving salts in
water, or monitor bodies of water for pollution.
Specifications:
Detection range: 0 - 20 mS.
- Resolution: 4 µS @ 0 < Reading <1000 µS, 0.5% Reading @ Reading >
1000uS.
- Total error: Less then 1.2% over the entire range.
- Typical input resistance: 250W.
- Equipped with a gain calibration screw.