AP303-21021001
AP303-21021001
AP303-21021001
AP303-21021001
AP303-21021001
AP303-21021001
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AP303/21021001

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ABB AP303/21021001 is a notched-guard combination pH sensor for threaded insertion, flow-through and immersion measurement in industrial processes.
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Technical specifications for AP303/21021001

  • Manufacturer:
    ABB
  • Part Number:
    AP303/21021001
  • Product Family:
    ABB Advant OCS and Advant-800xA
  • Product Type:
    Combination pH Sensor
  • Stock:
    1
  • Sensor role:
    Combination pH sensor
  • Body style:
    AP303 threaded insertion/immersion body
  • Process connection:
    3/4 in threaded
  • Insertion depth:
    38 mm (1.5 in)
  • Measurement range:
    0 to 14 pH
  • Process temperature:
    0 to 105°C
  • Reference system:
    Ag/AgCl, 3.5 M KCl gel matrix
  • Maximum pressure:
    6 bar (90 psi) at 25°C
  • Integral cable:
    6 m (20 ft)
  • Dimensions:
    2.8 × 12.7 × 2.8 cm
  • Connector arrangement:
    BNC for pH plus temperature-compensator connector
  • Included accessory code:
    00 — no accessory
  • Manual language code:
    1 — English
  • Tariff Code:
    9027900000
  • Country of origin:
    Sweden
  • Place of shipment:
    Xiamen, Fujian, China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Sensor Selection Process Mounting Signal Connection Application
  • Match official order code AP303/21021001 to the notched 3/4-inch body, standard yellow pH glass, Pt100 element and PTFE junction
  • Use the integral 6 m cable with its BNC and temperature-compensator connectors; accessory code 00 means installation hardware is separate
  • Select the notched bulb guard where glass protection is needed, but use a different ABB electrode design for heavily fouling service

AP303/21021001 is an ABB AP300-series combination pH sensor for industrial liquid analysis.

Its complete ordering code defines a 3/4-inch threaded insertion or immersion body with a notched guard, standard yellow-glass pH electrode, integral Pt100, porous PTFE liquid junction, 6 m cable and BNC plus temperature-compensator connectors.

Before installation, confirm process chemistry, pressure and temperature, transmitter compatibility, mounting method and all separately supplied flow-cell, coupling or immersion hardware.

Availability, condition, price, and shipping time for AP303/21021001 are confirmed during quotation.

ABB AP303/21021001 Manuals, Datasheets, Links

Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

  • Choose the AP303 notched guard where mechanical protection of the glass bulb is required and persistent fouling is not the dominant condition
  • Match the standard yellow-glass pH electrode to the documented process duty; low-temperature fast-response service requires a different ABB glass code
  • Use the integral Pt100 only with a transmitter input and configuration that support this temperature-compensation element
  • Use the 3/4-inch threaded AP303 body for the documented insertion, flow-through or immersion arrangement
  • Provide the compatible flow cell, coupling, conduit entry and process seal because accessory code 00 includes no optional mounting hardware
  • Isolate and depressurize the process before removal; AP303 is not a hot-tap retractable sensor assembly
  • Route the integral 6 m cable without modifying the factory sensor termination
  • Connect the BNC pH lead and the separate temperature-compensator connector to compatible transmitter inputs
  • Where extra distance is required, use ABB-supported extension hardware and preserve the documented shielding, reference and connector arrangement
  • pH monitoring in industrial and municipal water-treatment processes
  • Process pH measurement in food-production liquid streams
  • pH control and monitoring in compatible chemical-processing vessels and lines
Description
AP303/21021001 is an ABB AP300-series combination pH sensor for industrial liquid analysis.

The complete ABB ordering code specifies an AP303 3/4-inch threaded insertion or immersion body with a notched sensor guard, standard yellow-glass pH electrode, integral Pt100 temperature element, porous PTFE liquid junction, 6 m integral cable and BNC plus temperature-compensator connectors.

Before installation or replacement, confirm the official ordering code, process connection, wetted-material compatibility, transmitter input, connector arrangement, pressure and temperature limits, and any separately supplied mounting hardware.
Alternative Names
AP303/21021001 AP303 21021001 AP303-21021001 ABB AP303/21021001 ABB AP303 21021001 ABB AP303-21021001
Technical notes
AP303/21021001 is the official ABB ordering code; AP303-21021001-STD is an Apter record identifier and must not be treated as an ABB suffix. Confirm the notched PVDF body, standard pH glass, Pt100, 6 m cable, BNC/temperature connector and separately supplied process hardware before replacement.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
Is AP303/21021001 suitable for fibrous or heavily fouling process liquids?
Not normally. Its notched guard protects the glass bulb, but ABB identifies that guard as unsuitable where fouling is the dominant problem. For coating or solids-laden service, review an ABB flat or flush electrode configuration instead of assuming this AP303 code is interchangeable.
Can AP303/21021001 be used for ORP measurement because the AP300 family also includes ORP sensors?
No. The `2` measuring-electrode code specifies standard yellow pH glass, and the integral Pt100 configuration is for pH service. An ORP application requires the appropriate platinum-electrode ordering code and compatible transmitter configuration.
Can AP303/21021001 be withdrawn from a pressurized line without shutting down the process?
No. AP303 is a threaded insertion, flow-through or immersion body, not an AP304/AP305 hot-tap retractable assembly. Isolate and depressurize the process connection before removal.
Will AP303/21021001 connect directly to any pH transmitter?
Only when the transmitter accepts its BNC pH signal and the separate Pt100 temperature-compensator connection. Confirm input type, temperature-sensor configuration, connector pairing, cable routing and shield/reference practices before installation.
What installation hardware is supplied with AP303/21021001 for a flow-through line?
The `00` accessory code means no optional mounting accessory is included. The project must provide the compatible flow cell, coupling or immersion hardware, conduit entry and process sealing required by the installation.
Why can AP303/21021001 respond slowly in a cold process even when calibration is correct?
This complete code uses ABB's standard yellow pH glass. ABB offers a different low-resistance blue-glass option for faster response below 60°C; changing to that electrode requires a different ordering configuration rather than a parameter change to AP303/21021001.
What should be checked if pH is stable but automatic temperature compensation does not follow the process?
Check the integral Pt100 circuit, temperature-compensator connector, cable continuity and transmitter Pt100 input/configuration. Confirm the calibration belongs to this sensor and transmitter pair before replacing the pH element.

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