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Milwaukee MA812/2 EC/TDS Replacement Probe with 2 m Cable Default Title Dosing Pump Accessory Milwaukee Instruments
Milwaukee MA812/2 EC/TDS Replacement Probe with 2 m Cable Default Title Dosing Pump Accessory Milwaukee Instruments

Milwaukee MA812/2 EC/TDS Replacement Probe with 2 m Cable

$88.22

    Replace the sensing probe, not your monitoring setup.

    The Milwaukee MA812/2 is a hardwired EC/TDS service replacement with a 2 m cable for MC310 and MC410 monitors and the MC311 controller.

    • Exact MA812/2 conductivity/TDS probe with 2 m cable
    • Replacement by technical personnel only; not a plug-in probe
    • Recalibrate the host instrument after fitting

    SKU: BTS-MA812/2

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A service replacement for your existing EC/TDS system

Keep the instrument you already use and replace its sensing component with the correct part. The Milwaukee MA812/2 conductivity/TDS probe has a 2 m cable and is specified for the MC310 EC monitor, MC410 TDS monitor and MC311 EC controller.

Plan this as a service job, not a plug-and-play swap.

The probe is hardwired. Milwaukee reserves replacement for technical personnel, so confirm your instrument model and arrange qualified service before installation. The MA812/2 is not a generic DIN or BNC conductivity accessory.

Milwaukee MA812/2 replacement probe body, official catalog detail; cable not shown
Official catalog probe-body detail. The 2 m cable and hardwired termination are not shown; this is not a photograph of the complete replacement assembly.

Check fit and scope before ordering

  • Match the full part number: MA812/2 for MC310, MC410 or MC311. Do not select by a similar probe name alone.
  • Included component: conductivity/TDS probe with 2 m cable. The host instrument, mounting kit and calibration solutions are separate.
  • Keep the host specifications: this replacement does not add a display, controller or new measurement range.

Prepare for calibrated operation after service

Have the correct calibration standard ready for commissioning: 1413 µS/cm for MC310 and MC311, or 1500 ppm for MC410. Follow the host instrument's calibration procedure after the probe is changed, then recalibrate at least monthly.

For measurement, the operating instructions specify immersing the tip 4 cm into the sample and waiting for thermal equilibrium. During calibration, keep the metal sensing pins fully submerged in the standard and allow the reading to stabilize before adjustment.

Useful additions to the workflow

Compatible accessory: Milwaukee M10031B 1413 µS/cm calibration solution sachets (25). A practical calibration supply for MC310 and MC311 after probe replacement. For MC410, use the specified 1500 ppm TDS standard instead.

Related workflow: Milwaukee MC311 PRO Conductivity (EC) Controller. Consider the complete controller when you need an EC control system rather than a replacement sensing component. The MA812/2 is its specified service probe; the controller is sold separately.

MA812/2 buying and service questions

Which instruments accept the MA812/2?
The MA812/2 is specified for the Milwaukee MC310 EC monitor, MC410 TDS monitor and MC311 EC controller. Match the complete part number and instrument model before ordering; a similar MA812 model name alone is not a compatibility check.
Does it have a plug-in DIN or BNC connector?
No. Milwaukee identifies the MA812/2 as a hardwired probe. Treat it as a service replacement, not a user-swappable DIN or BNC accessory.
Who should install the replacement probe?
Milwaukee specifies replacement by technical personnel only. Arrange qualified service before installation. The linked MC310 operating instructions are a related instrument manual, not a standalone MA812/2 installation guide.
What is supplied, and how long is the cable?
This item is the MA812/2 conductivity/TDS probe with a 2 m cable. The monitor or controller, mounting kit and calibration solutions are not included. The catalog photograph shows the probe body detail only; the cable is not shown.
When should I recalibrate?
Recalibrate the host instrument when the probe is changed and at least once a month thereafter, following its operating instructions. Replacement does not remove the need for routine calibration.
Which calibration standard do I need?
Use 1413 µS/cm conductivity standard for the MC310 or MC311. The MC410 uses 1500 ppm TDS standard. Select the standard for the host model rather than treating EC and TDS calibration solutions as interchangeable.
How far should the probe enter the sample?
The operating instructions specify immersing the probe tip 4 cm into the sample and waiting for thermal equilibrium. During calibration, make sure the metal sensing pins are completely submerged in the correct standard.
Does the probe measure independently or change the instrument range?
No. The MA812/2 is the sensing component for its compatible monitor or controller, not a standalone meter. Readout, measurement range and calibration procedure belong to the host instrument; this replacement is not a range upgrade.

    Product Specifications

    SpecificationDetails
    BrandMilwaukee Instruments
    Product typeConductivity / TDS replacement probe
    Cable length2 m
    ConnectionHardwired
    Compatible instrumentsMC310 EC monitor; MC410 TDS monitor; MC311 EC controller
    InstallationReplacement by technical personnel only
    Supplied itemProbe with 2 m cable
    RecalibrationAfter probe replacement and at least monthly; follow host instrument instructions
    Calibration standards by hostMC310 / MC311: 1413 µS/cm; MC410: 1500 ppm
    Measurement immersion guidanceProbe tip: 4 cm; allow thermal equilibrium
    Sold separatelyMonitor or controller, mounting kit and calibration solutions

    Ordering Information

    SpecificationDetails
    Manufacturer part numberMA812/2

    Milwaukee Instruments Warranty & Returns Policy
    (For Milwaukee Instruments ONLY – Not for Milwaukee Tools)

    How to Initiate a Return or Warranty Claim
    For products purchased through Blue Tiger Scientific, all returns must be initiated directly with us. However, all warranty claims must be handled directly through Milwaukee Instruments.

    Warranty Information
    Milwaukee Instruments products are manufactured to meet the highest quality standards and come with a limited warranty against defects in materials and workmanship. Products may be returned for repair or replacement at Milwaukee's discretion. Warranty is void if the product has been abused, misused, or repaired by unauthorized persons.

    Product registration is handled directly by Milwaukee Instruments.

    Warranty Periods

    • Handheld testers, portable meters, and stationary monitors/controllers: 2 years
    • Bench meters: 3 years
    • PH600 pH Pen and similar versions: 1 year
    • Replaceable probes: 6 months

    Warranty begins on the original end-user purchase date or a maximum of 12 months from dealer purchase. Valid only with proper usage and maintenance. Service occurs at Milwaukee Instruments' North Carolina Technical Service Center.

    Note: Meters used in Kangen Water or “Negative ORP Water” applications are excluded from warranty coverage. Any warranty for these uses is null and void.

    Filing a Warranty Claim
    Contact Milwaukee Instruments Customer Service at (252) 443-3630 EST for an RMA number. Mark the RMA clearly on the box and ship prepaid. Improper packing can void the warranty.

    Return Policy (Blue Tiger Scientific)
    All purchases are final, but returns may be accepted under specific conditions:

    • Items must be in new condition with original packaging and contents.
    • Returns must be initiated within 14 days of purchase.
    • Subject to up to 30% restocking fee.
    • Customer pays all return shipping.
    • Initial shipping charges are non-refundable.

    Returns will be refused if packaging is damaged or contents are missing.

    Initiating a Return with Blue Tiger Scientific
    Contact Blue Tiger Scientific for an RMA and shipping instructions. Mark RMA clearly and pack securely to avoid transit damage. Shipping damage claims are the sender’s responsibility.

    Refunds, if eligible, will be processed within 5–10 business days. Credit card refunds may take longer to appear on your statement.

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