humimeter BMA-2 - biomass and wood chip moisture meter

Automatic biomass moisture measurement from a 12 litre sample

The humimeter BMA-2 is a patented stationary instrument for checking biomass deliveries. You pour in 12 litres of material and the device weighs the sample itself, measures its temperature by infrared and gives the water content - no manual weighing, no drying oven and no sample preparation. With the ATRO package it also shows bulk density, calorific value and tonnes of dry matter per cubic metre.

What you can measure

• wood chips
• wood pellets
• shavings and sawdust
• miscanthus
• corn cobs

Where it earns its place

• biomass intake points at heating plants and CHP plants
• wood chip suppliers - quality documentation on dispatch
• biomass certification bodies
• manufacturers of boilers and biomass harvesting machinery

Your benefits 12 litre sample and a built-in scale - bulk density is compensated automatically range 5 to 70 % water content, the widest in the biomass series resolution 0.1 % and calibration accuracy ±1.0 % non-contact infrared measurement of the sample temperature result in seconds, with no sample preparation data logger for 10 000 readings with a measuring point report USB module with LogMemorizer basic software included optional built-in printer and readings of bulk density, calorific value and tonnes of dry matter

How a measurement is taken

Select the curve that matches the material. Pour the sample into the measuring chamber with the bucket supplied - 12 litres, without compacting and without any preparation. The device weighs the portion itself, measures the temperature by infrared and compensates for bulk density. Read the water content and, with the ATRO package, the bulk density, calorific value and tonnes of dry matter per cubic metre. Store the result with the name of the measuring point, or print a protocol if the device has the built-in printer.

Extension packages

The packages are chosen when the device is ordered. The ATRO readings make sense wherever wood chips are settled not by the tonne of wet material but by energy or by dry matter.

Technical data

At 862 mm high and 29 kg this is a stationary instrument - worth counting on those numbers when planning the space at an intake point. Transport wheels, art. no. 13594, are available for moving it between positions.

Scope of delivery

• humimeter BMA-2 moisture meter with measuring chamber
• USB interface module with LogMemorizer basic software and a USB cable for the PC
• power supply unit
• two plastic buckets, 13 litres each, for filling the measuring chamber

Checking the readings

The test medium art. no. 12318, listed in the price list for the BMA-2 and the BMC, is used to check the readings. Independently of that it is worth comparing the result periodically with the oven method, the reference method under EN ISO 18134.

Extended accessories

• Art. no. 14944 - internal Bluetooth 5.0 module with LogMemorizer basic software
• Art. no. 11909 - LogMemorizer PRO, annual licence with cloud access
• Art. no. 13100 - external rechargeable battery for the BMA-2, for roughly 650 measurements
• Art. no. 12008 - thermal printer paper rolls, set of 20, 57 mm × 9 m
• Art. no. 13594 - transport wheels for the BMA-2, set of 2
• Art. no. 14394 - spring contact set for the BMA-2, spare part, 5 pieces
• Art. no. 12318 - test medium for the humimeter BMA-2 and BMC
• Art. no. 10600 - factory calibration certificate, adjustment protocol supplied with the device: check at three points of the wood chip curve (about 12.6 %, 31.4 % and 50.7 % water content) with a maximum tolerance of ±1.0 %; the curve and the points are always the same
• Art. no. 14740 - calibration including adjustment of a humimeter BMA or BMA-2 by the manufacturer's service; the certificate 10600 is ordered separately
• Art. no. 11217 - laboratory analysis and development of a calibration curve for a new material
• Art. no. 14823 - adjustment of an existing curve based on measurements taken at the customer site
• Art. no. 12153 - G110 moisture analyser for materials that cannot be calibrated into humimeter devices
• Art. no. 14380 - conversion of an older humimeter BMA into a BMA-2

That last item is often the interesting one for anyone who already owns the older instrument: instead of buying a new device, an existing BMA can be converted into a BMA-2.

BMA-2 or BMC

Both instruments measure wood chips from a large sample, but they are built for different work. The BMA-2 is stationary: it weighs 29 kg, runs from the mains and weighs the sample itself, and in return it measures up to 70 % with a resolution of 0.1 % and an accuracy of ±1.0 %, and with the ATRO package it reports calorific value and tonnes of dry matter. The humimeter BMC is portable - it runs on batteries or a rechargeable pack - and measures from a 12.5 litre sample in the range 5 to 50 % with an accuracy of ±1.5 %. At an intake point with its own power supply the BMA-2 makes more sense; in the field and across several locations, the BMC.

BMA-2 with ATRO package