DPA / DPAS

Combine Accuracy and Ease of Use

The DPA/DPAS are pre-pressurized, gel-filled, low-maintenance pH or redox

sensors for in-line measurements of industrial processes. Pre-pressurized reference electrolyte prevents influx of process medium and keeps the reference junction

clean. The silver-ion trap prevents reference junction fouling even in solutions containing sulfide. The DPAS delivers fast and precise measurements, even after repeated autoclaving or sterilization cycles at 130 °C （266 °F）.

The DPA/DPAS sensors are also available as a platinum redox （ORP） sensor for oxidation-reduction measurements.

pH range                          0 – 14 pH                              0 – 12 pH

Temperature                       0 to 100 °C （32 to 212 °F）       0 to 130 °C （32 to 266 °F）

Pressure                          0 to 2.5 barg （0 to 36 psig）     0 to 2.5 barg （0 to 36 psig） Plug head    S8 screw cap,   K8S screw cap,

Pg 13.5                               Pg 13.5

（for AS9 connector）                     （for AK9 connector）

Reference system                Argenthal with silver-ion trap     Argenthal with silver-ion trap

Type of junction                  Ceramic                                 Ceramic

Reference electrolyte             Pre-pressurized gel                     Pre-pressurized gel

Lengths                           120 mm, 225 mm, 425 mm   120 mm, 200 mm, 225 mm,

325 mm, 425 mm, 600 mm

Shaft diameter                    12 mm                                 12 mm

Temperature sensor               None                                     None

Sterilizable                        No                                       Yes

Autoclavable                      No                                       Yes

Glass membrane                 High alkali quality glass               pH sensitive quality glass

Certificates                        Quality certificate                       Quality certificate

Feature Overview

– Gel electrolyte does not require refilling, reduces maintenance

– Silver-ion trap prevents poisoning by sulfide-bearing substances

– Redox version available

– Option （DPAS only）: watertight VarioPin connector （IP 68） for easy connection and excellent signal transmission

Typical Applications （DPA）

– Industrial processing

– Reaction tanks

– Mixing vessels

Typical Applications （DPAS）

– Benchtop fermentors and bio-reactors

– Hygienic processes requiring autoclaving or SIP