Milwaukee EC40 EC/TDS Nutrient Meter
Milwaukee EC40 EC/TDS Nutrient Meter
Milwaukee EC40 EC/TDS Nutrient Meter
Milwaukee EC40 EC/TDS Nutrient Meter
Milwaukee EC40 EC/TDS Nutrient Meter
Milwaukee EC40 EC/TDS Nutrient Meter
Milwaukee EC40 EC/TDS Nutrient Meter
Milwaukee EC40 EC/TDS Nutrient Meter
Milwaukee EC40 EC/TDS Nutrient Meter
Milwaukee EC40 EC/TDS Nutrient Meter

Milwaukee EC40 EC/TDS Nutrient Meter

Availability: Out Of Stock
Brand: Milwaukee Instruments
DESCRIPTION The Milwaukee EC40 EC/TDS Nutrient Meter is designed for hydroponics, horticulture, and agriculture to ensure your...
$83.64
$100.37
$83.64
Subtotal: $83.64

Lead Time

this products ships in 1-2 days

  • Seres
Description

DESCRIPTION

The Milwaukee EC40 EC/TDS Nutrient Meter is designed for hydroponics, horticulture, and agriculture to ensure your plants receive the right amount of nutrients for healthy growth with minimal product waste. Keep EC/TDS in your target range for better results.

DESIGN FEATURES

  • Measures EC and TDS with Automatic Temperature Compensation (ATC).
  • Ideal range for hydroponics: 0.2 to 4 mS/cm / 2 to 40 CF / 140–2800 ppm (0.7 scale) / 100–2000 ppm (0.5 scale).
  • Readings directly in mS/cm, CF, and PPM — no conversions required.
  • Factory calibrated — no continuous calibration required.
  • Auto on/off feature.
  • 20 blue LED bar display.
  • Graphite electrode in ABC + PC body.
  • Battery level indicator.
  • Battery life up to 3 years at ~10 measurements per day.
  • 3 x 1.5V AA batteries included.
  • IP67 waterproof and floating.

CARE AND USE

Maintenance: EC/TDS electrodes can develop nutrient buildup over time. Always rinse the probe in fresh tap or DI water after every use to minimize buildup.

Converting EC to TDS: The EC40 displays readings directly in EC, CF, and TDS — no manual conversion needed. For reference: 2.00 mS/cm = 1000 ppm (0.5 scale) or 1400 ppm (0.7 scale).

SPECIFICATIONS

  • EC Range: 0.2–4 mS/cm | CF: 2–40 | TDS: 140–2800 ppm (0.7) / 100–2000 ppm (0.5)
  • Accuracy: ±4% of reading ±1 resolution point | ATC: 5 to 50°C
  • Battery: 3 x 1.5V AA / ~3 years | IP67, floating
  • Dimensions: 17" length / 1.2" diameter | Weight: 9 oz

Frequently Asked Questions

Q: What is the Milwaukee EC40 and why is it popular with hydroponic growers?
A: The Milwaukee EC40 is a factory-calibrated EC/TDS nutrient meter that requires no user calibration — ever. Its 20 blue LED bar display shows nutrient concentration at a glance in mS/cm, CF, and ppm without any conversion. IP67 waterproof and floating, it's built for daily use in wet hydroponic environments. Growers love it for its simplicity, durability, and 3-year battery life.

Q: Does the EC40 need to be calibrated and how accurate is it?
A: The EC40 is factory calibrated and requires no additional user calibration. Accuracy is ±4% of reading ±1 resolution point with Automatic Temperature Compensation from 5 to 50°C. For most hydroponic applications, this level of accuracy is more than sufficient for day-to-day nutrient management.

Q: What EC range does the Milwaukee EC40 cover and is it suitable for all crops?
A: The EC40 covers 0.2 to 4.0 mS/cm, which spans the nutrient requirements of virtually all hydroponic crops — from light feeders like lettuce and herbs (EC 0.8–1.6 mS/cm) to heavy feeders like tomatoes and peppers (EC 2.0–3.5 mS/cm). TDS readings are shown directly in ppm on both 0.5 and 0.7 conversion scales.

Q: Is the Milwaukee EC40 waterproof and what happens if I drop it in my reservoir?
A: Yes — the EC40 is rated IP67 (fully submersible to 1 meter for 30 minutes) and is designed to float. If dropped in a nutrient reservoir, it will float to the surface undamaged. This makes it one of the most durable and worry-free EC meters for daily hydroponic use.

Q: Where can I buy the Milwaukee EC40 EC/TDS nutrient meter?
A: You can purchase the Milwaukee EC40 directly from Seres Ag at seresag.com. Seres Ag is a trusted supplier of professional hydroponic instruments, nutrient meters, 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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