Application
The humimeter RH6 is a paper moisture meter with a sword probe, made for measuring in paper stacks and for continuous climate control in printing houses and paper stores. What sets it apart from the rest of the series is that it does not stop at air humidity: it converts it into the equilibrium moisture content of paper and wood with temperature compensation, and reports absolute humidity and dew point as well.
The USB module and the LogMemorizer software are included, so readings from the store go straight to a computer - with no interface to buy.
What the RH6 shows
- Relative air humidity 0 to 100 %, resolution 0.1 % RH, calibration 10 to 90 % with an accuracy of ±1.5 % RH (at 25 °C)
- Absolute humidity 0 to 130 g/m³, resolution 0.1 g/m³
- Temperature -10 to +60 °C, resolution 0.1 °C, switchable °C / °F
- Dew point -55 to +60 °C
- Equilibrium moisture content of paper for powerliner and testliner grades, with temperature compensation
- Equilibrium moisture content of wood 2 to 30 %, calibration 5 to 15 % with an accuracy of ±0.5 % (at 25 °C)
The difference against the simpler meters in the series is a practical one: instead of the air humidity inside the stack you get the paper moisture in per cent straight away - the figure a material specification and a complaint report actually work with.
How a measurement is taken
- Equalise the temperature first. The instrument has to be at the same temperature as the paper being measured - otherwise the humidity reading is shifted. A meter brought from a cold store into a warm hall has to be put down until its temperature reading matches the real one.
- Push the sword probe about 10 cm into the stack, straight, so as not to bend the aluminium sword. In heavy stacks use the sword sleeve (art. no. 10451) and after the measurement pull it out of the stack with the sword sleeve extractor (art. no. 10523). The sleeve also has to equalise its temperature with the sword.
- Every 10 seconds or so push it a few centimetres deeper, until the target depth is reached.
- Wait for the reading to stabilise and freeze it with the hold function or store it in the logger.
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Technical data
| Parameter |
Value |
| Relative air humidity |
0 to 100 %, resolution 0.1 % RH |
| Humidity calibration |
10 to 90 % RH, ±1.5 % RH (at 25 °C) |
| Absolute humidity |
0 to 130 g/m³, resolution 0.1 g/m³ |
| Temperature |
-10 to +60 °C, 14 to 140 °F, resolution 0.1 °C |
| Temperature calibration |
±0.3 °C (at 25 °C) |
| Dew point |
-55 to +60 °C, -67 to 140 °F, resolution 0.1 °C |
| Equilibrium moisture content of wood |
2 to 30 %, calibration 5 to 15 %, accuracy ±0.5 % (at 25 °C) |
| Compensation |
equilibrium moisture content of paper and wood with temperature compensation |
| Memory |
hold function, automatic and manual logger for 10 000 readings with measuring point reports |
| Display |
backlit matrix display 128 × 64 |
| Dimensions |
441 × 74 × 33 mm |
| Sword probe length |
295 mm |
| Weight |
310 g (with batteries), 1 kg with the case |
| Storage temperature |
-20 to +60 °C |
| Protection rating |
IP 40 |
| Power supply |
4 × 1.5 V AA alkaline batteries |
| Menu languages |
English, German, French, Italian, Spanish, Portuguese, Czech, Russian, Polish and an international version |
| Article number |
11497 |
Scope of delivery
- humimeter RH6 moisture meter with a sword probe
- rubber protective cover
- case (art. no. 15427)
- USB interface module with LogMemorizer basic software and a USB cable
- 4 alkaline AA batteries
- operating manual
Extended accessories
- Art. no. 14944 - internal Bluetooth 5.0 module with LogMemorizer basic software
- Art. no. 14957 - USB interface module with its own battery supply, with LogMemorizer basic software and a USB cable
- Art. no. 11909 - annual LogMemorizer PRO licence with cloud access; requires the USB or Bluetooth interface
- Art. no. 15444 - thermal printer with rechargeable battery (USB-C version), portable serial printer for humimeter devices with a USB interface
- Art. no. 10451 - sword sleeve made of stainless steel, for work in heavy paper stacks. It fits the RH6 and all RH5 versions (RH5, RH5.1 and RH5.2), since they all have the same sword. Before the reading the sleeve has to equalise its temperature with the sword.
- Art. no. 10523 - sword sleeve extractor for pulling the sleeve (art. no. 10451) out of a heavy stack, steel with a plastic handle. It is meant for the sleeve only, not for pulling out the meter.
- Art. no. 10072 - calibration device for the sword probe, 10 × 7 × 4 cm, 160 g
- Art. no. 10352 - certified calibration ampoules, set of 5 at 50 % RH
- Art. no. 10403 - factory calibration certificate, adjustment protocol supplied with air humidity meters
- Calibration certificate with PCA accreditation - an alternative to the factory certificate (art. no. 10403). We calibrate the meter in an accredited Polish laboratory (PCA, the Polish Centre for Accreditation) and ship it to the customer together with the certificate; the certificate 10403 is then not needed.
- Art. no. 11131 - calibration and adjustment of the device at the manufacturer’s service
RH5 or RH6
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The whole series shares the same housing of 441 × 74 × 33 mm, the same 295 mm sword probe and the same weight of 310 g. The differences are in what the meter calculates and what comes in the box.
- RH5.1 - relative humidity, temperature and dew point. Calibration ±2.0 % RH. Batteries only in the box.
- RH5 - the same as the RH5.1 but calibrated to ±1.5 % RH, with a rubber cover and a case in the box.
- RH6 - additionally absolute humidity and the equilibrium moisture content of paper (powerliner, testliner) and wood with temperature compensation. Rubber cover, case (art. no. 15427) and the USB module with the LogMemorizer software in the box.
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If controlling the hall climate and comparing stacks against each other is enough, the choice is the RH5. If the result has to go into a report as paper moisture in per cent, or if readings are to be collected and archived on a computer, the RH6 makes more sense - the USB module with the software, an extra with the RH5, is part of the delivery here.
Polski