CS525-LISFET pH Probe

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pH Sensors/ CS525-L

RETIRED ›
This product is no longer available and has been replaced by:CS526-L.

Services Available
Repair	No
Calibration	No
Free Support	No

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Detailed Description
Specifications
Compatibility
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Overview

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.

Compatible with the CWS900-series interfaces, allowing it to be used in a wireless sensor network
Electronics are safely embedded in a durable resin body
Elimination of the glass-bulb makes the probe more durable and safer to use
Fully temperature-compensated
Innovative ISFET pH-sensing element used as measurement electrode
Designed and manufactured under stringent quality control conditions in an ISO 9001 environment, ensuring good measurements
Each sensor individually tested
Compatible with all contemporary data loggers (including the CR200X series)

The "-L" on a product model indicates that the cable length is specified at the time of order.

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CSIM11-L pH Sensor

Detailed Description

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.

Note:The CS525-L ISFET pH Sensor is highly susceptible to ground looping and galvanic conditions.The best isolation technique to overcome these issues is to use a CWS900-series Wireless Sensor Interface.In many cases, the CS525 can also be isolated byNOTgrounding the data logger to an earth ground. Please discuss your application with Campbell Scientific before purchasing the sensor.

Specifications

CE Compliance	CE Compliant
pH Range	0 to 14
Power Requirements	4.5 to 5.5 Vdc
Current Consumption	2 mA (nominal)
Measurement Time	200 ms <_67%< 500 ms
Accuracy	±0.1 pH (with two-point calibration)
Operating Temperature	0° to 70°C
Allowed Water Pressure	0 to 30 kPa (0 to 45 psi)
Cable Type	Two-twisted pair, 22 AWG cable with Santoprene jacket
Sensor Material	Polyaryletheretherketone (PEEK)
Diameter	16 mm (0.63 in.)
Maximum Cable Length	300 m (1000 ft)
Length	190 mm (7.48 in.)
Weight	318 g (11.2 oz) with 3.05-m (10-ft) cable

Output
-NOTE-	Output range used depends on which wires are connected to the data logger.
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

Compatibility

Note:The following shows notable compatibility information. It is not a comprehensive list of all compatible or incompatible products.

Data Loggers

Product	Compatible	Note
CR1000(retired)
CR200X(retired)		The CR200X-series dataloggers require the VDIV2:1 2-to-1 Voltage Divider; contact Campbell Scientific about using this sensor with a retired data logger.
CR206X(retired)		The CR200X-series dataloggers require the VDIV2:1 2-to-1 Voltage Divider; contact Campbell Scientific about using this sensor with a retired data logger.
CR211X(retired)		The CR200X-series dataloggers require the VDIV2:1 2-to-1 Voltage Divider; contact Campbell Scientific about using this sensor with a retired data logger.
CR216X(retired)		The CR200X-series dataloggers require the VDIV2:1 2-to-1 Voltage Divider; contact Campbell Scientific about using this sensor with a retired data logger.
CR295X(retired)		The CR200X-series dataloggers require the VDIV2:1 2-to-1 Voltage Divider; contact Campbell Scientific about using this sensor with a retired data logger.
CR3000(retired)
CR5000(retired)
CR800
CR850
CR9000X(retired)