CS525 - Campbell Scientific

CS525
ISFET pH Probe
Campbell Scientific’s CS525 pH probe provides reliable,
accurate pH measurements that are fully temperature compensated. This probe makes general pH measurements in
aqueous or semi-solid solutions, and can be submersed or
inserted into tanks, pipelines, and open channels.
The CS525 uses SENTRON’s high-tech, Ion Sensitive Field
Effect Transistor (ISFET) semi-conductor as its pH-sensitive
element, and includes a silver/silver chloride - potassium
chloride reference system. The ISFET technology is
the most powerful pH monitoring technology available
today. This technology considerably reduces the number
of acidic or alkaline errors in extreme pH conditions. It
allows the CS525 to monitor pH in liquids containing high
solids, aggressive chemicals, or biological materials that
would clog or contaminate the junction of the traditional
glass-bulb pH probes.
The CS525’s rugged design makes it suitable for just about
any liquid pH-monitoring application, from laboratory to
harsh field applications. The probe’s electronics are safely
embedded in a durable PEEK body. Elimination of the
glass-bulb removes the possibility of broken glass, making
the CS525 more durable and safer to use.
1
Features/Benefits
• Innovative ISFET pH-sensing element used that makes
better measurements in extreme pH conditions
• No clogging or contamination of junction
• Easily cleaned
• More rugged than the traditional glass electrode pH
probes allowing the CS525 to be deployed in the field
for longer time periods
• Compatible with all Campbell Scientific dataloggers1
(including the CR200(X) series)
• Designed and manufactured under stringent quality
control conditions in an ISO 9001 environment
• Each sensor individually tested
• CE compliant
• Fully temperature compensated
Questions • Research • Pricing
www.campbellsci.com/cs525
The CS525-L ISFET pH Sensor is highly susceptible to ground looping and galvanic conditions. In many cases, the CS525 can be isolated by NOT
grounding the datalogger to an earth ground. However, the most successful isolation technique to overcome these issues is to use a CWS900series Wireless Sensor Interface. Please discuss your application with a Campbell Scientific applications engineer before purchasing the sensor.
Ordering Information
Specifications
pH Probe
CS525-L
ISFET pH Probe with user-specified cable length. Enter
length, in feet, after the -L. Must choose a cable termination option (see below).
Cable Termination Options (choose one)
-PT
Cable terminates in a connector for attachment to a
prewired enclosure.
-CWS
Cable terminates in a connector for attachment to a
CWS900-series interface. Connection to a CWS900series interface allows this sensor to be used in a wireless sensor network.
0 to 14
Power Requirements:
4.5 to 5.5 Vdc
Current Consumption:
2 mA nominal
Measurement Time:
200 ms < t67% < 500 ms
Output (two output ranges are available)2
Range A:
0 to +5000 mV; +2700 mV at pH7
and 25°C with a sensitivity of
270 mV to 330 mV/pH at 25°C
Range B:
±400 mV with a sensitivity of
-45 mV to -50 mV/pH at 25°C
Cable terminates in stripped and tinned leads for
direct connection to a datalogger’s terminals.
-PW
pH Range:
Solutions
Accuracy:
±0.1 pH with two point
calibration
Operating Temperature:
0° to 70°C
25587
pH4 Buffer Solution (500 ml container). Two or more
different buffer solutions are required for calibration.
Allowed Water Pressure:
0 to 700 kPa (0 to 101.5 psi)
25586
pH7 Buffer Solution (500 ml container). Two or more
different buffer solutions are required for calibration.
Maximum Cable Length:
300 m (1000 ft)
Cable Type:
25588
pH10 Buffer Solution (500 ml container). Two or more
different buffer solutions are required for calibration.
three-twisted pair, 24-AWG
cable with Santoprene® jacket
16349
KCl solution used for cleaning (4 oz container)
Sensor Material:
polyaryletheretherketone
(PEEK)
Accessories
7421
Split Mesh Cable Grip
VDIV2:1
2-to-1 Voltage Divider required when using a CR200(X)series datalogger.
Dimensions
Length:
Diameter:
190 mm (7.48 inches)
16 mm (0.63 inches)
Weight w/10 ft Cable:
318 g (11.2 oz.)
2
The output range used depends on which wires are connected to the datalogger. Refer to the manual for more information.
Campbell Scientific, Inc.
USA
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(435) 753-2342
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Copyright © 2009, 2011
Campbell Scientific, Inc.
Printed June 2011