ABBAP100 pH/Redox (ORP) cartridge sensors with water-wash option

Measurement made easy Tough and durable sensors for on-line pH measurement Compact 'all-in-one' cartridge design 

• simplifies sensor replacement, minimizing downtime Detachable cable option 

• ensures rapid and easy installation and commissioning 'Wetted' sensor 

• ready-to-go straight from the box Low resistance 'blue-glass' version 

• unique solution for cold water applications Flow, dip, insertion and submersible systems 

• satisfies a wide range of applications Small-bore flow system 

• for use on applications where only small volumes of sample are available Stainless steel flow system option 

• for use on low conductivity samples Water-wash option 

• minimizes maintenance where coating of the glass electrode is a problem Replaceable liquid junction 

• maximizes sensor life and enables replacement of the electrolyte

The cartridge The cartridge sensing system has a proven track record in a wide range of applications. New features such as the low resistance ‘blue-glass’ and the small-bore flow version for low volume samples reinforces the performance and extends the applications that can be fulfilled using this versatile and welltested system. Manufactured in glass-coupled polypropylene, the all-in-one sensor can be supplied for flow-through, dip and submersible applications. Flow systems – can be supplied with a choice of process connections and materials to meet the demands of the sample to be measured. The bayonet snap-fit enables rapid and convenient access for calibration – just twist and turn and the sensor is released for easy and quick calibration. Pipeline adaptor (7670/063) – is available to enable the sensor to be inserted directly into a pipe. Dip systems – available in 1, 2 and 3 m (39, 78 and 117 in) lengths for use in open channels and tanks. Submersible systems – available with an integral sealed connection cable enabling the sensor to be completely submerged – ideal for boreholes or where there is a large rise and fall in the sample to be measured. Provision is made for a support chain to be attached to the system. A wide range of standard cable lengths is available. Water-wash options – available for flow and dip systems where coating of the pH glass causes maintenance issues. Water-wash has proven very successful in many applications. Detachable cables – an option that makes replacing the sensor a simple, easy-to-do operation. The use of IP67 plug and socket connectors ensures that problems caused by moisture ingress do not occur and enables reliable operation in the most demanding applications

The cartridge Double-junction PTFE reference – a key feature to minimize the risk of blocking of the junction and protect against poisoning of the electrolyte. Supplied ready-to-go – fitted with a wetted teat to ensure the sensor is in optimum condition and requires no preconditioning prior to installing and commissioning. Small-bore flow systems – ideal for applications where only small sample volumes are available (between 100 and 500 ml/ minute [0.176 and 0.88 pints/minute]) for continuous analysis. These flow systems are offered in a choice of two materials, stainless steel and Delrin, both widely used on low conductivity water. Being small and compact they help to keep the panel size to a minimum when used on multiparameter packages and are a very cost effective solution. Low resistance glass – a unique glass designed particularly for cold water samples where conventional sensors perform sluggishly due to low sample temperatures (below 10 °C down to 0 °C [below 50 °F down to 32 °F]). This sensor is used extensively on potable water treatment works where the sample temperature is commonly below 10 °C (50 °F). A further benefit of the low resistance glass is improved speed of response where the sample has a low conductivity (less than 100 µS/cm and down to 20 µS/cm). Water-wash systems – have proven extremely successful on potable water treatment plants where iron or manganese coat the glass electrode, increasing maintenance levels. The frequency and duration of the clean is controlled via the AX400 Analyzer and during the clean cycle the current output and alarms are frozen to prevent spurious alarms. Redox (ORP) sensors – supplied in flow, dip and submersible systems, with water-wash options available for flow and dip systems. They are used widely in the treatment of waste water and, in particular, for electro-plating for the treatment of cyanide and chromate waste liquor.

Reference electrode refurbishment kit To allow the maximum working life of the sensor to be achieved, a refurbishment kit is available (Part No. 7670/088). The kit contains a replacement PTFE liquid junction, a bottle of 3.5M KCl reference electrolyte solution and pipette, a liquid junction removal/refitting tool and all necessary O-rings. Many sensors are replaced because the liquid junction becomes blocked due to the nature of the sample or because the electrolyte solution is exhausted. Replacing the junction and electrolyte extends sensor life and reduces the cost of ownership.

Specification – water-wash version Flow systems pH range 

• 0 to 14 pH – standard glass 

• 0 to 10 pH – low resistance glass Temperature range 

• 0 to 100 °C (32 to 212 °F) – standard glass 

• 0 to 70 °C (32 to 158 °F) – low resistance glass Pressure (flow) 0 to 60 psi at 25 °C (77 °F) Process connections 

• 1/2 in or 1 in BSP 

• 1/2 in or 1 in NPT Dip systems Immersion length 1 m (39 in), 2 m (78 in) or 3 m (118 in) Material of construction Glass-coupled polypropylene and polypropylene pH range 

• 0 to 14 pH – standard glass • 0 to 10 pH – low resistance glass Temperature range 

• 0 to 80 °C (32 to 176 °F) – standard glass

• 0 to 70 °C (32 to 158 °F) – low resistance glass O-ring material Viton Water supply Mains water Line pressure 1 to 4 bar Note. ABB does not supply the solenoid valve and recommends that the tubing between the valve and the sensor is 1/4 in ID PVC for both dip and flow systems. The solenoid valve must be mounted as close as possible to the pH system in order to reduce pressure loss in the supply line.