max. depth 1,200m

The redox (OPR) sensor consists of a pressure-balanced platinum electrode and reference electrode (Ag/AgCl) in a plastic rod. The device is desinged for in-situ measurements up to 1,200 m depth. The sensor is further equipped with a ceramic diaphragm containing a high number of pores and a reference system consisting of a gel (stiff polymer mass containing KCl without Ag+-ions). Due to the silver-free reference electrolyte, the sensor is H2S resistant.

The redox-sensor is supplied with a storage solution in a wetting cap. The cap must always be placed beneath the sensor and contain sufficient storage solution to store the sensor when not in use. The storage solution should be a 3 M KCl solution that prevents the reference electrode from drying out.

The sensor needs replacement after a lifespan of approximately 12 months (depending on the measuring environment).

Technical data:

  • Pressure resistance: 1,200 dbar
  • Measuring range: ± 2,000 mV
  • Accuracy: ± 1 mV
  • Resolution: approx. 1 mV
  • Response time: 1 s t63% of reading
  • Dimensions: 12 mm Ø, 84 mm long, 150 mm with flange
  • Feature: H2S resistant
  • Used for: CTD48, CTD48M, CTD48c, CTD48Mc, CTD75M, CTD90, CTD90M, CTD115M

>> Show data sheet here