Technical Parameters
Parameter | Measuring Range | Maximum Error | Resolution |
|---|---|---|---|
Moisture content | 5% – 30% | ±(1%Rh + 0.5) | 0.5% |
Temperature | -10°C – 60°C | ±2.5°C (±5°F) | 0.1°C / 0.1°F |
Operating environment | 0°C – 40°C | — | Humidity: 0-85% Rh |
Weight | Host: 190.6 g | Probe: 208.3 g | — |
Dimensions | Host: 72 x 35 x 145 mm | Probe: 415 x 36 x 36 mm | — |
Power supply | 3 x 1.5V AAA battery | — | — |
Who Uses the GM640 in Kenya
Smallholder and Commercial Farmers
Maize, bean and wheat farmers across the Rift Valley grain belt — Uasin Gishu, Trans Nzoia, Nakuru and Narok — use the GM640 to decide when a standing crop is ready for harvest and when stored grain is safe to bag, rather than relying on the traditional bite-and-crunch test.
Cereal Cooperatives and Aggregators
SACCOs and produce cooperatives buying grain from members need a consistent, defensible moisture reading before pricing a delivery — the GM640 gives every collection point the same instrument, removing disputes over spot-checked handfuls of grain.
Millers, Processors and Grain Traders
Milling companies and bulk grain traders in Nairobi, Nakuru, Eldoret and Thika use handheld moisture meters like the GM640 for intake spot-checks alongside lab-grade moisture analyzers, especially at smaller depots where a full analytical balance is not justified.
NCPB and Warehouse Receipt System (WRS) Agents
Depot staff verifying grain against NCPB or WRS moisture ceilings need a fast, portable check before a truckload is accepted or rejected at the weighbridge — a role the GM640's few-second reading time is built for.
