Dual High Impedance KPH601 Online PH Sensor Differential Amplifier
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Detailed Product Description
KPH601 Online PH Sensor Signal Output: RS-485 (Modbus/RTU Protocol)1.Temperature compensationThis has to be taken into consideration if pH values obtained by
different temperatures are to be compared. Furthermore, the slope
depends on the temperature (Nernst equation): E = E0 – 2.303 RT / F
∆ pH (R,F = constant) Where: E = measured potential E0 = zero
point potential ∆pH = difference in pH between outside and inside
of the glass membrane F = Faraday constant R = universal gas
constant T = temperature Kelvin the slope increases with an
increase in temperature (see “5.6 The influence of temperature on
pH measurements“ on page 85). The most exact pH value is obtained
when the temperature of the calibration and measured solutions are
identical. pH Theory Guide 35 METTLER TOLEDO The temperature
compensation of the transmitter corrects for this effect. An
electrode would have an ideal temperature behavior if its
calibration lines (isothermals) intersect at the zero point of the
electrode (pH 7 = O mV) at different temperatures (see Figure 18
below). Figure 18 Calibration line and isothermal intersection
points. Since the overall potential of the pH electrode is composed
of the sum of many single potentials, which all have their
respective temperature dependencies, the isothermal intersection
hardly ever coincides with the zero point of the electrode (the
ideal case would be: 0 mV at pH = 7/25°C). In the last few years,
the development of the electrode has concentrated on bringing the
isothermal intersection and the zero point as close together as
possible, since the nearer they are to pH 7 the smaller the error
in the temperature compensation. Besides, the measuring error
increases with an increasing temperature difference be-tween the
calibration and the actuai measuring. As a rule the errors are in
the order of 0.1 pH units. |
Model | KPH601 |
Measuring Range | 0~14pH |
Resolution | 0.01pH |
Accuracy | ±0.1pH |
Working Temperature | 0~65℃ |
Working Pressure | <0.2MPa |
Temperature Compensation | Auto temperature compensation (NTC) |
Power Supply | 12~24VDC ±10% |
Signal Output | RS-485(Modbus/RTU) |
Wetted Material | POM |
Mounting Method | Immersion mounting, 3/4 NPT thread |
Cable Length | 5 meters, other lengths can be customized |
Calibration | Two-point calibration |
Power Consumption | <0.3W@12V |
Protection Grade | IP68 |
3.Dimensional Drawing
Note:The sensor connector is M16-5 core waterproof joint male head.
4.Installation
Note: The sensor should not be installed upside down or horizontally when installed, at least at an angle of 15 degrees or more.
Contact Us
Website www.kacise.com
Phone +86-17719566736
Email sales@kacise.com
Location Tangyan South Road, High-tech Zone, Xi'an City, Shaanxi Province, China
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