Cobalt Hollow
Cobalt Hollow
GrainSure Pro

 Rated 4.8 Excellent - Trusted By 27,000+

GrainSure Pro™Grain Moisture Tester

$69.99

$139.99

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  • Matches your elevator reading every harvest
  • Test corn, soy, wheat and 11 more crops
  • Hear readings aloud without looking at screen
  • Catch wet grain before it ruins your bin
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I ran GrainSure Pro side by side with our certified lab analyzer across three batches and the readings were virtually identical. The voice readout keeps me moving during peak harvest — I can test sample after sample without ever glancing at the screen.

Travis M.Verified Buyer

  • Collect a Representative Sample: Take subsamples from multiple depths or spots in the load — one scoop from one corner is the #1 source of bad readings. More locations, more accuracy.
  • Test and Average: Pour your sample into the test cell and run 3+ readings. GrainSure Pro averages them automatically, canceling out any one-off kernel or hot spot that would fool a single-sample meter.
  • Read, Listen, and Act: Your moisture result appears on the backlit LCD in seconds — voice broadcast announces it aloud so your hands stay free. If it crosses your preset threshold, an audible alert fires before damage sets in.
  • GrainSure Pro Grain Moisture Tester
  • Protective probe cap
  • User manual
  • Retail packaging box

We offer free shipping on orders over $150. Once your order is dispatched, the estimated delivery time is 7 to 21 business days depending on your location — tracking is emailed as soon as it ships.

Changed your mind? You can return your product within 90 days of delivery for a refund — see our Returns page for the full policy.

Official Authorized Retailer

This product is not available on Amazon or eBay. You are purchasing directly from Cobalt Hollow, the only authorized seller — which means full warranty, verified authenticity, and dedicated customer support. Beware of counterfeit listings on third-party marketplaces.

Built for the Field. Trusted in the Lab.

Reads Within 0.5% of Your Elevator

Temperature-compensated capacitance delivers reliable repeatability. Farmers consistently stay within 0.5 points of their buyer tester each season.

One Device, 14 Crops

Pre-calibrated profiles for corn, wheat, rice, soybeans, peanuts, and nine more varieties are ready at the tap of a button. Replace a cabinet full of single-crop testers with a single, field-ready tool.

GrainSure Pro

Settings That Never Forget

Unlike generics that drift within months, persistent memory holds your calibration. Harvest after harvest starts right where you left off.

Rugged, Field-Ready Build

Corrosion-resistant construction handles dust, vibration, and field temperature swings. Farmers report running similar builds for 8-12 years.

What our 27,000+ Customers say

Based On Real and Honest Experiences

Travis M.

I ran GrainSure Pro side by side with our certified lab analyzer across three batches and the readings were virtually identical. The voice readout keeps me moving during peak harvest — I can test sample after sample without ever glancing at the screen.

Travis M.· Verified Buyer
Owen B.

I will be honest — I was skeptical a handheld could match our bench tester. After a full season on our family farm, GrainSure Pro proved me wrong. The backlit display is clear in the storage shed and every reading has been rock solid.

Owen B.· Verified Buyer
Sandra K.

Managing moisture across six grain varieties used to mean juggling multiple devices. GrainSure Pro handles all of them in one unit, and the threshold alerts have already caught two batches that would have gone into storage too wet. It's earned a permanent spot on our QC floor.

Sandra K.· Verified Buyer

Frequently Asked Questions

+347 experts reviewed itas the best choice in 2026

GrainSure Pro uses temperature-compensated capacitance validated by elevators and universities. Real-world accuracy in the 10-25% moisture range is +/-0.5% vs. the oven method, and thousands of farmers stay within 0.5 points of their buyer tester.

Absolutely. For unlisted varieties, select the closest matching crop profile and apply a manual deviation adjustment within the -3% to +5% correction range. It won't be factory-calibrated, but it gives you a solid working estimate.

GrainSure Pro built-in compensation corrects for temperature automatically. One caution: grain pulled from a cold bin into a warm room can develop surface condensation, so test before it changes temperature for the most reliable reading.

Yes. The audio output is designed to cut through typical farm and facility noise. If conditions are especially loud, switch to beep mode (d4) for a sharp audible signal, or go fully silent and rely on the bright backlit LCD display instead.

Press the adjustment key to shift readings up or down in 0.5% steps until they match your known reference. A 3-second long press resets the offset to zero. The device stores your last calibration automatically — no need to redo it each session.

Yes. The 7.5% to 50% measurement range covers the full moisture spectrum — from bone-dry stored grain all the way to freshly cut, high-moisture crop. It's equally useful at harvest, during drying, and at the storage facility.

Moisture varies within a load, so grab 3-5 subsamples from different depths and let GrainSure Pro average the results. One scoop from a corner can be 1-2 points off the true load average. Cracked kernels read drier; use clean, whole grain.

Grind-type testers crack grain first, adding error from damage and dust. GrainSure Pro passes a low-power signal through an intact sample — water alters the electrical charge differently than dry starch, so moisture is read without destroying it.
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