Digital Humidity & Moisture Tester – Multi-Grain Analyzer for Wheat, Soybean Meal, Peanut, Lab Use

The AR991 Grain Moisture Meter is a handheld digital instrument designed to measure the water content percentage in a wide range of grains, seeds, and agricultural products. Built on the resistance measurement principle, it delivers fast, on-the-spot readings without the need for lab equipment or complex setup.

This tool is suited for grain traders, farmers, storage facility managers, millers, and agribusiness professionals who need reliable moisture data at the point of harvest, purchase, or storage. With a 23.5cm stainless steel probe and a total device length of 42.5cm, it reaches deep into grain sacks and bulk storage with ease.

Key Features

• Measures 14 Grain & Seed Types: Supports Rice (Paddy), Wheat, Corn, Barley, Sorghum, Feed, Rapeseed, Melon Seeds, Sesame, Soybean Meal, Soybeans, Peanuts, and Cotton Seed — selectable via the Variety button. This makes it versatile enough for multi-crop farming operations and grain buying stations where several commodity types are handled daily.
• Moisture Range: 7.5% – 50% (Accuracy: ±1%): Covers the full moisture spectrum from dry-stored grain to freshly harvested produce. The ±1% accuracy means readings are precise enough for quality grading and procurement decisions, reducing post-storage losses caused by excess moisture.
• LCD Backlit Display with Voice Broadcast: The large backlit screen ensures clear readings in low-light environments such as warehouses, store rooms, or early morning field use. The voice broadcast function reads out the moisture value audibly — useful when working alone or in noisy conditions.
• Long Stainless Steel Probe – 23.5cm: The extended probe penetrates deep into grain bags, bales, or bulk storage containers, giving readings that reflect the actual interior moisture — not just the surface layer. Total device length is 42.5cm, weighing just 254g for comfortable one-hand operation.
• Data Storage & Alarm Value Function: Stores previous readings for reference and comparison. The alarm function alerts you when moisture levels exceed a set threshold — helping prevent acceptance of grain that doesn't meet storage or quality standards.
• Adjustable Deviation Correction (-3% to +5%): After oven-method calibration, users can manually adjust the reading offset within a -3% to +5% range. Settings are saved even when batteries are removed, so recalibration isn't needed every time the device is switched on.
• Auto Power-Off After 15 Minutes: Conserves battery life during long working sessions. Powered by 4 AA batteries (not included), with a low-battery indicator on screen to prompt timely replacement.

Where it's Commonly Used

• Grain buying depots and cereal aggregation centers testing incoming stock
• Farm-level use during or immediately after harvest to assess drying needs
• Flour mills and feed processing plants monitoring input material quality
• Seed storage facilities managing long-term inventory condition
• Agricultural research stations and field laboratories requiring portable measurement tools

How to Use

1. Insert 4 AA batteries into the battery compartment
2. Press the ON/OFF button to power on the device
3. Use the Variety button to select the grain or seed type you want to measure
4. Insert the probe fully into the grain sample or storage container
5. Wait for the reading to stabilize on the LCD screen — the moisture percentage will display automatically
6. Press the Voice button if you want the reading read aloud
7. To set an alarm threshold, use the Limit button and adjust to your required value
8. Hold the ON/OFF button for 2 seconds to power off and save your settings

The AR991 Grain Moisture Meter is a practical, field-ready instrument for anyone involved in grain handling, storage, or trade. Its multi-grain compatibility, readable display, and adjustable settings make it a dependable tool for day-to-day agricultural and commercial use.