Differences between Infrared Thermogravimentric Moisture Analyzers & Hygrometers
 |
The OHAUS moisture analyzer and hygrometer both measure
forms of moisture, but we will briefly explain the differences
between the two instruments |
The OHAUS MB45 determines moisture in a sample through
thermogravimetric analysis. Plainly speaking OHAUS moisture
analyzers calculate the weight change between the value of a solid
dry sample and the wet weight of that same sample.
MB 35 and MB 45
The MB45 Moisture is ideal for sampling applications in the food
processing, pharmaceutical, environmental, and chemical industries,
providing loss on drying results in powders, pastes and/or liquids.
The statistical function mode for process analysis makes the MB45
even more effective for applications such as Quality Control and
Assurance. The MB45 does all of the calculations, displays the end
results, and will print out the information for recording
purposes.
With a standard capacity of 45g, the MB45 moisture analyzer has a
readability of 0.001g or 0.01%. The halogen heating technology
performs up to 40% faster than infrared drying technology, and
allows users to heat samples from 50° C to 180° C in under a
minute. In addition, the MB45 incorporates software applications
designed to simplify operation, save time and produce accurate
results. The graphical LCD works in tandem with the software to
display % moisture, % solids, temperature, time, a real time drying
curve and more.
The product's integrated database allows users to store up to 50
drying procedures, eliminating the need to enter common drying
procedures time after time. OHAUS' intuitive interface simply
prompts the user to select a programmed procedure and begin,
significantly reducing redundant practices and boosting overall
mistake free productivity. The MB45 also offers a timer that can be
set from 0.1 to 120 minutes to accommodate virtually any moisture
analysis procedure, and an audible signal automatically notifies
the user when each test is complete.
Hygrometer
Hygrometers are instruments which measure the water vapor content
in the atmosphere. There are several different means of
transduction used in measuring this quantity and hence various
types of hygrometers. These are: a) the psychrometer, which
utilizes the thermodynamic method; b) the class of instruments
which depends upon a change of physical dimension due to absorption
of moisture (hair hygrometer, for example); c) those which depend
upon condensation of moisture (dew point hygrometer)
Hygrometers only measure humidity and temperature to give you an
idea of the relative humidity. Relative humidity is a value that
communicates more accurately how hot or cold you "feel," rather
than the exact heat or coldness of the air. Homes, offices,
museums, factories, and greenhouses can all use small, handheld
digital hygrometers to monitor their environments.
In your household, you might use digital hygrometers in certain
rooms to monitor the use of an air conditioner, heater, fireplace,
humidifier, or dehumidifier. This way, you can keep your home's
temperature around 70° F (21° C), which is comfortable for most
people, and your humidity around 47%.
Hygrometers measure the water vapor content in the atmosphere.
Hygrometers do not separate the total moisture content (including
saturated fats, oils and liquids) from the material as in the case
of OHAUS Moisture Analyzers. Hygrometers have no laboratory
function in testing or ascertaining the quality of an end product
due to alteration, addition or presence of moisture including
saturated fats, oils and other liquids in the product.
Figure 2, Shows a sample energy absorption, conduction and partial
deflection of ray wave energy by using Infrared (IR) Moisture
Analyzer to separate total moisture including saturated fats, oils
and other liquids from the sample leaving the residual solid
content intact.