As an international active and renowned manufacturer, supplier and service provider of measuring systems for the non-contact determination of various process parameters (e.g. density and humidity) mainly in bulk goods (e.g. coal, potassium salt) by means of different physical measuring principles, we have an extensive range of products.
The products have been designed and developed to be used in numerous applications.
POCON 21 is a micro computer that was specially designed for measuring the potassium content.
By connecting different detectors (2π and 4π geometry), the device can be optimally adapted to measure both alkaline and solid salt.
The calibration can be done in percent KCl as well as in percent K2O, whereby the internal calibration table can save up to 20 comparison values.
A special correction measurement with two reference samples for processing different environmental conditions enables the device to be used regardless of location without time-consuming recalibration.
POCON 21 has two operating modes for determining the potassium content:
● Measurement in continuous operation
● Batch operation via start-stop signals.
All inputs and outputs are galvanically isolated from the computer and equipped with reverse polarity protection.
The potassium content is output as an analog 0 / 4-20mA signal with freely selectable scaling with 10 bit accuracy (<0.5%).
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Power supply:
● Standard: - 230V ~
● Optional: - 115V ~, 24V ~, 24V =
Counter inputs:
● 2 galvanically decoupled 16 bit counters
● Dead time 1.5μs
● max. Pulse rise time 250ns
● 1, 2, 4 or 8 measurements per second
● maximum count rate 8 * 216 pulses / s (with 8 measurements / s)
Digital inputs:
● 4 galvanically isolated inputs (switching threshold 3V)
● maximum input voltage 24V
● individually switchable logic
Digital outputs:
● Standard:
- 4 potential-free relay contacts (changeover contacts)
- Max. 110V DC, 125V AC; Max. 1A; Max. 30W
● Optional:
- 4 electronic relay outputs
- galvanically decoupled maximum output voltage 30V
- overload protection
- individually switchable logic
Current output:
● Standard:
- 1 analog output (galvanically isolated)
- 0 ... 20mA or 4 ... 20mA adjustable
- accuracy +/- 0.5%
- freely scalable
- Detection of line breaks in both operating modes
● Optional:
- 2nd current output
Dimensions:
● WxHxD 101.4mm (20HP) x 128.2 (3U) x 188mm
Miscellaneous:
● Illuminated 4-line LC display (4x16 characters)
● Keypad with tactile and acoustic feedback
● Signal generator
● Battery backup via lithium cell
● Integrated watch dog function
● Optional: serial interface
Temperature range:
● 0-55 ° C (ambient temperature)
Weight:
● 518g (without case)
● 5100g (with wall housing)
Wall housing:
● IP 54 classification
The natural potassium consists of a mixture of K isotopes, i.e. the atomic nucleus and different numbers of neutrons.
The ratio of the radioactive (β and γ rays) K-40 to the other isotopes is always 0.012%, while the half-life (time after which only half of the radioactivity remains) is extremely long (1.26 billion years),
The measurement of radioactivity is therefore a reliable measure of the concentration of potash.
It is not important whether the K-40 content is measured in KCl or K2O, because this is only one factor that is normally included in the calibration.
A powerful radiation detector is required to measure the radiation.
Most people know a so-called Geiger counter, but compared to the detector used for this system, it is too insensitive because it has to be absorbed to measure the radiation, which cannot be done with the Geiger counter, however, because gas is a bad absorber.
To meet the highest sensitivity requirements. two detectors PD50 with large plastic scintillators are connected to the POCON 21, which generate an electrical signal from the radiation, the strength of which depends on the intensity of the radiation and this in turn depends on the concentration.
In order to make a concentration signal from the intensity signal, a mathematical conversion is necessary, which is done by the POCON 21 evaluation unit based on microcontrollers.
● simple, intuitive teaching
● retrofitting
● no contact with the material to be measured
● Measurement independent of:
- medium
- process conditions
● Maintenance-free because there is no wear
● high operational reliability
● Long-term stable measurement
● Recalibration is not necessary
● Checks before delivery:
- Quality, climate and function
● own development and production in Germany
● Use of high quality materials and components
● Use of proven technology
● Worldwide sales and on-site service by trained personnel
Our staff would be happy to help you and take care of your inquiries and orders.
You can get help and advice on the selection of the measuring system that best suits your application
from our experts in process measurement technology.