Milwaukee MC311 PRO Conductivity (EC) Controller
Milwaukee MC311 PRO Conductivity (EC) Controller
Milwaukee MC311 PRO Conductivity (EC) Controller
Milwaukee MC311 PRO Conductivity (EC) Controller

Milwaukee MC311 PRO Conductivity (EC) Controller

Availability: In Stock
Brand: Milwaukee Instruments
ACCURATE. SIMPLE. RELIABLE. 24/7 EC CONTROL. The Milwaukee MC311 PRO Conductivity (EC) controller automatically monitors and adjusts...
$178.50
$214.20
$178.50
Subtotal: $178.50

Lead Time

this products ships in 1-2 days

  • Seres
Description

ACCURATE. SIMPLE. RELIABLE. 24/7 EC CONTROL.

The Milwaukee MC311 PRO Conductivity (EC) controller automatically monitors and adjusts EC levels. Set your EC parameters and let the controller do the rest. Preferred for nutrient tanks, aquariums, and recirculating hydroponic systems requiring continuous EC management.

DESIGN FEATURES

  • Fast, easy-to-read results with large digital LCD readout and visual LED alarm.
  • Accurate to ±2% full scale (0.0 to 10.0 mS/cm) with user-selectable high/low set points.
  • Set point range: 0.8 to 2.8 mS/cm.
  • Simple one-point calibration with manual trimmers.
  • MA812/2 hardwired EC probe with 6.5-foot cable included.
  • One dosing relay outlet for compatible nutrient dosing pump (Milwaukee MP810 compatible).
  • Automatic Temperature Compensation (ATC) from 0 to 50°C.
  • Complete mounting kit with probe holder included.
  • 12 VDC power supply included.

SPECIFICATIONS

  • Range: 0.0–10.0 mS/cm | Resolution: 0.1 mS/cm | Accuracy: ±2% F.S.
  • Set point: 0.8 to 2.8 mS/cm
  • Calibration: Manual, 1-point
  • Alarm: Active when reading is outside set point
  • Temperature Compensation: Automatic, 0 to 50°C
  • EC Electrode: MA812/2 (included)
  • Power Supply: 12 VDC adapter (included)
  • Power Drivers: 115 VAC, 2A, 60Hz or 230 VAC, 1A, 50Hz
  • Environment: 0 to 50°C / 32 to 122°F; max RH 95%
  • Dimensions: 5.9 x 3.2 x 1.35 inches | Weight: 6.3 oz

Frequently Asked Questions

Q: What is the difference between the Milwaukee MC311 PRO controller and the MC310 PRO monitor?
A: The MC310 PRO is a monitor — it measures EC and triggers an alarm when levels drift, but does not control any dosing devices. The MC311 PRO is a controller — it does everything the MC310 does, plus it has a dedicated relay outlet that automatically activates a connected nutrient dosing pump (such as the Milwaukee MP810) to raise EC when it drops below your set point. The MC311 PRO is the choice for fully automated, hands-free EC management.

Q: What set point range does the MC311 PRO support and is it adjustable?
A: The MC311 PRO supports a set point range of 0.8 to 2.8 mS/cm, which covers the typical EC range for most hydroponic crops and aquarium systems. High and low set points are user-selectable via manual trimmers, and the alarm activates whenever EC falls outside your configured range.

Q: Does the MC311 PRO compensate for temperature and how accurate is it?
A: Yes. The MC311 PRO includes Automatic Temperature Compensation (ATC) from 0 to 50°C, ensuring EC readings remain accurate as solution temperature changes. Accuracy is ±2% full scale across the 0.0 to 10.0 mS/cm measurement range, calibrated via simple one-point manual calibration.

Q: What dosing devices are compatible with the MC311 PRO relay outlet?
A: The MC311 PRO's relay outlet supports 115 VAC (2A, 60Hz) or 230 VAC (1A, 50Hz) devices, including the Milwaukee MP810 peristaltic dosing pump and other compatible nutrient dosing systems. When EC drops below your set point, the controller activates the dosing pump to add nutrient concentrate until EC returns to the target range.

Q: Where can I buy the Milwaukee MC311 PRO EC conductivity controller?
A: You can purchase the Milwaukee MC311 PRO directly from Seres Ag at seresag.com. Seres Ag is a trusted supplier of professional EC controllers, hydroponic automation equipment, and controlled-environment agriculture supplies. Shop at seresag.com for competitive pricing, fast shipping, and expert support.

Shipping & Returns
We ship daily from Monday through Friday, and shipments are processed within 24-48 hours of cleared payment.
Orders placed over the weekend are processed on the next business day.

Free Shipping

Specific Vendors offer free shipping over a certain amount. This will be automatically applied during checkout.

Orders over $10,000 before tax qualify for free shipping!

Free Shipping only applies to domestic US (lower 48 states -- sorry, Alaska & Hawaii) shipments.

Shipping Rates

Shipping rates are calculated during checkout based on the weight, dimensions, and destination of the ordered items. We do our best to calculate the exact cost.

Updated 5/1/2023:

Please note that due to the higher shipping costs and larger dimensions of some of our products, our shipping calculator may not always provide an accurate shipping estimate. In these cases, we will reach out to you with an updated shipping quote after you place your order. If you have any questions about shipping costs, please don't hesitate to contact us before placing your order. We apologize for any inconvenience and appreciate your understanding.

Seres reserves the right to notify you of any additional shipping charges. We partner with multiple vendors and locations, which can alter shipping rates. In addition, there are conditions out of our control (rural areas, fuel surcharge, multiple shipments). If this occurs, you will be contacted immediately and have the right to modify or cancel your order for a full refund. 

Address Change / Order Cancellation

If you need to change the shipping address, please get in touch with us at support@seresag.com or call 1-877-237-3754. 

Once the order is shipped, we will do our best to perform an address intercept. You will be charged an Intercept Fee imposed by the shipping carrier. This fee varies from each carrier. Please note not all shipping carriers will accept address intercept changes.

If an order is canceled in transit, you are solely responsible for all shipping charges incurred by the Shipping Carrier.

Shipping charges will not be refunded.

Tracking

Once an order has been shipped, we will send an email and text message on file with the tracking number. If your order is fulfilled from multiple vendors or locations, you will receive shipment confirmations with tracking for each shipment. 

In addition, you can check the status of your order through the order confirmation email or within your profile page under Track Order.

Freight (LTL)

Scheduled appointments deliver freight shipments. You are responsible for inspecting for damage incurred in transit and signing before the driver leaves. DO NOT accept the shipment if there is any damage. If your freight shipment arrives damaged, contact us immediately.

Once delivered, we cannot reimburse paid freight charges or refund products.

Some restrictions may apply; Hawaii and Alaska do not qualify for free shipping offers.

Damaged Shipment

It rarely happens, but once in a while, products are damaged during Shipping. Therefore, please scrutinize all shipments for damaged or missing items before signing for them (if required).

The shipping carrier is responsible for items damaged during Shipping, which will most often be UPS, FedEx, or USPS. 

If assistance is needed, please get in touch with us immediately. Seres cannot promise refunds or replacements if this is not done within 72 hours. 

By signing your name and accepting shipment for a Freight(LTL) order, you get no reimbursement of freight charges, order costs, or any other charges incurred.

Lead Times

Please note that there is up to a 7-day processing period for orders containing Hawthorne products.

Signature

Due to the valuable contents of many products we sell,  the carrier may need a signature upon delivery. Please understand that this is a measure our company took to ensure safe delivery and fraud protection.

Third-Party Carriers will attempt to deliver a signature-required order three times. 

Please follow up with the carrier for assistance if a missed-delivery note is received.

If assistance is needed, please get in touch with us, so we can help contact the carrier. 

Shipping costs will not be refunded for missed shipments.


Seres is not responsible for any missing, lost, or stolen items.
 

At this time, we do not ship to post office boxes or APO/FPO addresses.  

For more information, please read our Terms of Service.

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