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6-Channel
Monitoring System:
3 x Dissolved Oxygen,
3 x pH / ORP / Ion Concentration and
6 x Temperature Channels |
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6-Channel Monitoring System:
4 x Dissolved Oxygen,
2 x pH / ORP / Ion Concentration and
1 x Temperature Channels |
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6-Channel Monitoring System:
6 x pH / ORP / Ion Concentration and
6 x Temperature Channels |
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6-Channel
Monitoring System:
6 x Dissolved Oxygen and
6 x Temperature Channels |
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10-Channel
Monitoring System:
8 x pH /ORP / Ion Concentration,
2 x Conductivity and
2 x Temperature Channels |
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12-Channel
Monitoring System:
12 x pH / ORP / Ion Concentration Channels |
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12-Channel
Monitoring System:
12 x Dissolved Oxygen and
12 x Temperature Channels |
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12-Channel
Monitoring System:
6 x Dissolved Oxygen,
6 x pH / ORP / Ion Concentration and
6 x Temperature Channels |
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12-Channel
Monitoring System:
12 x pH / ORP / Ion Concentration and
12 x Temperature Channels,
with Galvanic Isolation between the Channels |
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16-Channel
Monitoring System:
16 x pH /ORP / Ion Concentration and
4 x Temperature Channels |
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24-Channel
Monitoring System:
24 x pH /ORP / Ion Concentration Channels |
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48-Channel
Monitoring System:
36 x pH /ORP / Ion Concentration,
12 x Conductivity and
1 x Temperature Channels |
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24-Channel
Modular Monitoring System:
24 x pH /ORP / Ion Concentration |
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| Software
Features |
- Calibration
and Monitoring software running on Windows (TM of Microsoft
Inc) platforms Win 2000 / ME / XP / Vista / Win7
- The software
is specific to the type of Multi-channel instrument.
- The software
displays the data output for pH, ORP, Ion concentration, Dissolved
Oxygen, Conductivity and Temperature.
- Number
of used channels can be selected.
- pH / ORP
/ various Ions can be selected.
- Time between
measurement cycles selectable from 2 sec to 60 sec in 1 sec
steps and 1 min to 60 min in 1 min steps
- Time limit
for the duration of the measurement can be set.
- Filter
Grade (gliding average) can be set.
- The data
are acquired, stored and displayed on-line in table-form.
- Tabular
Display of mV, pH and Temperature, ATC on/off.
- Parameter
values are displayed in mV, ppm, mol/L and °C units.
- The table
includes the time and date of each measurement cycle.
- The stored
data are in text format with Tab and LF separation and can be
exported to Excel or other software packages.
- 2 to 6
point calibration for pH and Ions.
- Single
channel and multi-channel calibration.
- Calculation
of pH value and ion-concentration based on this calibration.
- Automatic
Temperature compensation can be enabled and disabled for each
channel separately.
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Applications |
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Screenshot
of a 12-Channel pH Monitoring System
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Screenshot
of the first 4-Channel of a 24-Channel Monitoring System for
pH / ORP / Ions / Temperature
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Screenshot
of the Excel Printout of a 24-Channel Monitoring System for pH /
ORP / Ions / Temperature
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| Description |
- Continuous,
Real-time Monitoring and Sample Measuring of:
pH, ORP, Ion Concentration, Dissolved Oxygen, Conductivity,
Salinity, TDS and Temperature in Multiple Vessels in Various
and Multiple Parameter combinations.
- Very Compact,
very Cost-effective Solution.
- Replaces
Data Acquisition using multiple Transmitters
- Connects
to a Host Computer or Automation System (PLC) via Serial Communication
(RS232, RS485, USB).
- Simple,
transparent Communication Protocol enables the customer to write
his own Software: e.g. by using LabVIEW, Daisy Lab, C++, Visual
Basic, etc.
- For MS
Windows based operating systems we offer Software (see Screenshots),
which enables the user to Calibrate, Display and Store the Sensor
Signals and the resulting Parameter Values.
- The Data
Acquisition Rate can be selected over a wide range.
Display of Date and Time for each Measurement.
- The Data
are stored in Text form and can be viewed, edited or exported
to Excel or any other Software.
- Systems
available for 6, 8, 12, 18, 24 and more Channels.
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| Features Top |
- The inner
Modular Structure of the System enables us to Tailor an affordable
Solution to the customer's needs.
- Full Flexibility
in selecting the Number of Sensors with specified Parameters.
- Delivery
Time 3 to 6 weeks
- Country-specific
Mains Power Adapter is supplied.
- The simple,
transparent Communication Protocol makes it easy for the user
to write their own Software for processing the measurement data.
- Easy Connection
of Sensors to the Front Panel.
- High-quality
Sensor-Amplifiers allow the use of
most of the available Sensor types and makes.
- Galvanic
Isolation between the Ground for the Sensor Amplifiers, Power
Supply and Serial Communication.
- Versions
with Galvanic Isolation between the Sensor Channels available
to eliminate Ground Loops.
- For distances
greater than 5 m between the Sensors and the System we suggest
the use our long-life, battery-powered Sensor Pre-Amplifiers.
- Software
compatible with Windows 2000 / ME / XP/ Vista and Win7.
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| Top |
| Hardware
Specification |
- Dimensions
& Weight:
Depending on the type of the Instrument
Dimensions: Length- 300 mm, Width- 200 mm or 260 mm
and Height- From 60 mm to 150 mm
Weight: 1.5 kg to 3 kg
- Enclosure
Material: ABS.
- Protection
Class: IP62 / NEMA2.
- Power
Supply:
12 V DC stabilized, 300-1200 mA depending upon the number of
channels.
Connector: DC Power socket, 2.1 mm, Centre is positive.
Each instrument comes with a country specific Mains Adaptor.
- Connection
to the Computer:
Serial Data Transmission RS232: 9600 baud, no parity, 8 data
bits, 1 stop bit. Optional RS 485 or USB data transmission provided.
A standard 2 m long, serial data cable to connect the system
to a PC serial port (COM 1 or 2, RS232) is provided.
Optionally RS232 to USB Converter is also provided.
- Sensor
Connections:
All Sensor Connectors are arranged on the Front Panel of the
instruments for easy access:
BNC sockets for pH-, ORP- and Ion-selective Electrodes.
2 mm Banana sockets for external Reference Electrodes.
4-way Mini-DIN sockets for Dissolved Oxygen Sensors (with or
without built-in Temperature Sensor).
6-way DIN sockets for Conductivity Cell (2-Electrode cells).
Isolated 3.5 mm sockets (Mono-Audio) for Temperature Sensors.
- Sensor
Amplifiers:
pH-, ORP-, and Ion Selective Electrodes: The Amplifiers
for pH-, ORP-, and Ion Selective Electrodes are high quality
Electrometer amplifiers with:
Input Resistance higher than 1 Terra Ohm (1012 Ohm).
Input Bias Current less than 0.1 pico Amperes (10-13
Amperes).
D.O.: For Dissolved Oxygen measurements, please tell
us the type of the Sensors being used. We can supply Amplifiers
from 10 nA 100 µA, for Galvanic or Polarographic Sensors.
Conductivity: For Conductivity and Salinity Measurement
we supply a Measuring System which uses low-frequency (100Hz)
alternating current.
The Current average is always zero, no polarisation can occur.
The Current adjusts continuously to the actual Conductivity
value of the sample. Currents and Voltages are measured, so
that for any Conductivity value a good Sensitivity is achieved.
Temperature: We can supply Temperature Amplifiers for
Thermistor Temperature Sensors (NTC), for Pt1000 and Pt100 Temperature
Sensors.
- Sensors:
pH: Accepts all types including pH Electrodes with built-in
Temperature sensor (Pt1000) or pH Electrodes with separate PT1000
Temperature sensors and pH Microelectrodes.
ORP: Accepts practically all types of ORP Electrodes.
ISE: Accepts practically all types of Ion-selective Electrodes.
D.O.: Accepts Galvanic and Polarographic Dissolved Oxygen
Sensors. Please specify the Type and Make of the preferred sensor.
Conductivity: Accepts 2-Electrode Conductivity Cells
with K=0.1, K=1, and K=10 Cell constants.
Temperature: Accepts Temperature Sensor with PT1000
or Thermistor sensor element.
- Measuring
Range, Resolution and Accuracy:
pH:
Range: 0.00 to 14.00.
Resolution: 0.01 pH unit
Accuracy: 0.01 pH unit
ORP:
Standard Range: -1000
to +1000 mV.
Ranges upto -3,000 to +3,000 mV are available on request
Resolution:
0.1 mV.
Accuracy:
±0.3 mV (0.03% of full range)
For Ion-selective Measurements the Range, Resolution
and Accuracy depends on the type of the Electrode (the type
of the ion that is to be measured) and Calibration.
For Dissolved Oxygen Measurements the Range, Resolution
and Accuracy depends on the type of the D.O. Sensor type.
For Conductivity and Salinity Measurements
the Range is from:
1 µS to 500 µS with Cell constant of K=0.1.
10
µS to 5 mS with Cell constant of K=1.
100 µS
to 50 mS with Cell constant of K=10
Our system uses 2-electrode Conductivity Cells.
The Resolution is approximately 0.5% of the measured
value.depending on the range.
The Accuracy is highest near the calibration point,
about 0.5%. Therefore a calibration close to the expected sample
value is recommended.
Temperature:
Range:
0 to 100°C
Resolution:
0.1°C
Accuracy:
±0.2°C in the range of 10°C to 70°C
±0.5°C
in the range of 0°C to 100°C
Our NTC Temperature sensors can be exchanged without re-calibration.
Automatic Temperature Compensation can be activated when Temperature
sensors are connected.
- Galvanic
Isolation:
The Sensor Amplifiers are fully galvanically isolated from Power
Supply and the Data Transmission to the Computer.
Versions are available where the Channels are galvanically isolated
from each other to avoid interferences and ground loops.
If a Channel-to-Channel isolation is necessary, then it will
depend on the measuring configuration.
In cases where the measurements are performed in separate glass
or plastic vessels a Channel-to-Channel isolation is required.
We can advise you for the optimal solution regarding cost-effectiveness
and accuracy of measurement.
- Distributed
Measurements:
If
the distance between the sensors is more than 5 m (max upto
100 m), it makes sense to place small battery-powered (3 years
battery life) Sensor Pre-Amplifiers close to the measuring points.
This increases the accuracy of the measurements and allows to
use cost-effectve sensors with standard cable length of 1 m.
You will find these Amplifiers in Transmitters
section.
- Measurement
and Sampling Rates:
The system does not allow fast measurements. The conversion
time of the integrating A/D converter for one channel is 100
ms (Milli seconds).
The channels are measured sequentially.
For a 12-channel monitoring system without temperature measurement
the shortest cycle time is 2 seconds.
For a 12-channel monitoring system with temperature measurement
the shortest cycle time is 3 seconds.
For special fast measurements it is recommended to use our single-channel
or multi-channel Electrode Amplifiers with Analogue Output,
which can be connected to fast Data Acquisition Systems. The
researcher can then tailor the system exactly to his requirements
and find the right compromise between speed and noise.
- Measurements
with High Sample Rate:
There are 2 reasons why the measuring frequency is limited:
- For
precise measurements it is necessary that an electrochemical
equilibrium is established in the sample, the indicator
electrode and the reference electrode.
- Some
of the electrochemical measurements (especially pH) involve
very high impedance (upto 1000 mega ohms) sensors. An integrating
Analogue-to-Digital conversion eliminates electrical interferences
(Signal-Noise).
An Analogue-to-Digital
Conversion Time of 100 ms per channel is suitable.
This means for 6 channels, a sample rate of 1 full measurement
cycle per second
(including some spare time) is achievable.
With suitable software (Microsoft Excel) a 1 to 10 interpolation
delivers good results for 100 ms time-slices.
If for special research projects (e.g. study of electrochemical
interfaces) a higher sample rate is required, please use our
Amplfiers and available fast Data
Acquisition Systems (e.g. from National Instruments).These Systems
are made to reduce the problems which can occur with high sample
rates.
- Conformance
Marking and Safety:
The system is CE and WEEE marked and fulfils all standard
safety (not medical) regulations.
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