CS526-L Digital ISFET pH Probe
CS526-L Digital ISFET pH Probe

The CS526 uses SENTRON’s high-tech, ion-sensitive field-effect transistor (ISFET) semiconductor as its pH-sensitive element, and includes a silver/silver chloride– potassium chloride reference system. The CS526’s design allows it to be suitable for a variety of liquid pH-monitoring applications. The electronics are safely embedded in a durable PEEK body. Elimination of the glass bulb removes the possibility of broken glass, making the CS526 more rugged and safer to use.

Note: Campbell Scientific warranty does not cover a clogged reference diaphragm or improperly cleaned or maintained ISFET chip. (See the Maintenance section in the instruction manual for more information.)

This sensor requires the 5 V output on the data logger to be powered.. 

Benefits and Features

  • Innovative ISFET pH-sensing element
  • Easily cleaned
  • More rugged than the traditional glass electrode pH probes
  • Each sensor individually tested
  • Designed and manufactured under stringent quality control conditions in an ISO 9001 environment
  • CE compliant

The CS526 isolated pH probe makes reliable, accurate pH measurements in aqueous solutions. It can be submersed or inserted into tanks, pipelines, and open channels. This probe has a serial, TTL output that represents a 2 to 12 pH range.

  • CS526-L Digital ISFET pH Probe measures pH using state-of-the-art ISFET technology.
  • There is no glass bulb to break, making the sensor safer and much more rugged.
  • Provides better measurements in extreme pH conditions.
  • The probe can go a longer time without servicing, is easier to clean, and can be stored dry.
  • Electronics are safely embedded in a durable resin body
  • Elimination of the glass-bulb makes the probe more durable and safer to use, allowing it to be deployed in the field for longer time periods
  • Innovative ISFET pH-sensing element used that makes better measurements in extreme pH conditions
  • Each sensor individually tested
pH Range 2 to 12
Power Requirements 5 Vdc
Current Consumption 15 mA (maximum)
Accuracy ±0.2 pH (over 10° to 40°C)
Operating Temperature Range 10° to 40°C
  • Serial TTL logic
  • 2400 bps
  • 8 data bits
  • no parity
  • 1 stop bit
24 h Drift < 0.15 pH (after 15 min. soak in pH 7 at 25°C)
Allowed Water Pressure 0 to 700 kPa (0 to 101.5 psi)
Cable Type Three-twisted pair, 24 AWG cable with Santoprene jacket
Sensor Material Polyetheretherketone (PEEK)
Maximum Cable Length 100 m (328 ft)
Diameter 16 mm (0.63 in.)
Length 102 mm (4 in.)
Weight 318 g (11.2 oz) with 3.05 m (10 ft) cable


Enter the terms you wish to search for.