humimeter RP6 - recycling paper moisture meter

Bale moisture measured without taking the bale apart A bale of recovered paper is bought by weight, and the water in it weighs exactly as much as the paper. The humimeter RP6 is placed against the surface of the bale and gives the water content in seconds - to a depth of 500 mm, that is through the whole bale rather than just the outside. The same movement finds damp pockets, which turn into mould and loss during storage.

Curves selected by the density of the bale

The reading depends on how tightly the material is pressed, so the RP6 carries nine curves labelled by density: 250, 300, 350, 400, 450, 500, 550, 600 and 650 kg/m³. There is also a free slot for a curve of your own for an unusual grade, and a separate check curve used only for testing the instrument. Choosing the curve that matches the real density of the bale is the first condition of a sensible result.

External probes to choose from

The device itself measures with the measuring plate held against the bale. The external probe socket adds two more ways of measuring.

Art. no.	Picture	Description
13837		Stainless steel insertion probe, 0.3 m long, for recovered paper and corrugated board. Useful where the material is loose or stacked rather than pressed into a bale.
12004		LF_TB 120 precision probe: head in a 0.3 m stainless steel tube with a sintered cap, 2 m cable. Relative humidity 0 to 100 % RH, calibration 10 to 90 % RH ±1.5 % RH at 23 °C.

Your benefits

• measurement to a depth of 500 mm, through the whole bale
• damp pockets found without taking the bale apart
• nine curves selected by the density of the material
• range 1 to 50 % water content
• external probe socket - insertion probe or precision probe
• housing rated IP 64
• lithium-ion battery for 60 to 100 hours of work
• USB module with LogMemorizer basic software and a case included
• logger for 10 000 readings with the measuring point and supplier details

How a measurement is taken Select the curve matching the density of the bale. Place the measuring plate flat against the surface of the bale so that it touches over its whole area, and press with a force of about 4 kg. Read the water content and the material temperature. Repeat at several points on the bale. When a series is stored, the instrument works out the average itself.

Checking the readings

Operating manual v2.9 recommends checking the calibration every four weeks using the check curve and the test plate. For unusual grades the manufacturer offers an additional test medium in a wooden case (art. no. 10726); it is not needed for a routine check.

Technical data

Scope of delivery

• humimeter RP6 moisture meter
• USB interface module with LogMemorizer basic software and a USB cable for the PC
• rechargeable battery
• carrying case

The USB module with the software is included, so moving readings to a PC costs nothing extra. An external probe is an option - it is not needed for measuring bales.

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. 15444 - thermal printer with rechargeable battery, USB-C version
• Art. no. 10726 - additional test medium for the RP6 in a wooden case, for unusual grades
• Art. no. 10600 - factory calibration certificate, adjustment protocol supplied with the device

RP6 or a meter for paper in a stack

The RP6 is made for pressed bales and sorted recovered paper - it measures deep and through dense material. For paper and solid board in a stack there is the humimeter PMP, selected by the density of the paper, and for equilibrium humidity in a stack the humimeter RH5 with its sword probe. Three different jobs and three different instruments; we are glad to help pick the right one.