SmartTest
Family
Hand held MS2123 Moisture Series
Ref: HMS2123sWAIntE
Version: 2002-02-26
Recommended Measurement for Micro-biological, Chemical, Ultra fine powder and Enzymatic Materials
Food, pharmaceutical, coatings, hygroscopic powders, pills, paper, photographic film industry
The active part of
moisture content and, therefore, water activity, provide better information
than the total moisture content regarding the micro-biological, chemical and
enzymatic stability of perishable products such as foods and seeds. For similar
reasons, water activity is equally relevant in the pharmaceutical industry
where it provides useful information regarding the cohesion of tablets and
pills, or the adherence of coatings. Water activity can be directly compared
with the relative humidity of the ambient air to prevent dimensional changes in
a product (paper, photographic film), to prevent hygroscopic powders (powdered
sugar, salt) from caking or turning into a solid block, etc.
Water activity can be used with some products (mostly synthetic products) as a
means of indirectly measuring the total moisture content. This requires
developing sorption isotherms to this purpose. Sorption isotherms are graphs
that provide the relationship between water activity and moisture content at
constant temperature. For most natural products, repeatable sorption isotherms
cannot be reliably developed and water activity should be regarded as separate
from moisture content.
Series
accessories, test gas, liquids to solids with the one instruments
Water activity Aw
(or equilibrium relative humidity %ERH) measures the vapor pressure generated
by the moisture present in a hygroscopic product.
Aw = p / ps and %ERH = 100 x Aw, where:
p :
partial pressure of water vapor at the surface of the product
ps : saturation pressure, or the partial pressure of water vapor above
pure water at the product temperature
Water activity reflects the active part of moisture content or the part which,
under normal circumstances, can be exchanged between the product and its
environment.
Water activity is usually defined under static conditions of equilibrium. Under
such conditions, the partial pressure of water vapor (p) at the surface of the
product is equal to the partial pressure of water vapor in the immediate
environment of the product. Any exchange of moisture between the product and
its environment is driven by a difference between these two partial pressures.
Accelerated water
activity measurement in typically 5 minutes
Conventional water
activity measurement with automatic detection of equilibrium
Includes carrying
case, sample holder, disposable sample cups, humidity calibration standards.
Optional docking
station with external AC adapter for bench top use
HBD5ms2100 analyzer accepts a large choice of probes, suitable for the direct measurement of products in bulk and other applications.
l Water activity test
l Moulds Free Safe Days (MFSL) prediction
l Humidity, temperature test
l Moisture measurement for gas, liquids and solids
l pH test supported
l Conductance test supported
Aw Range: 0.03-1.000
Accuracy: 0.015Aw (<+/-0.3°C, at room temperature )
Repeatability:< 0.005 Aw (<0.1°C, at room temperature)
Temperature: -20 to 85°C; -50 to 200°C
Instrument environ: -10 to 60°C; 0-99%RH
Battery supply
3 mode to test:
Test time: ~5 min Typical at WASmart:
The HBD5MS2100NC is a battery operated water activity Analyzer with a single probe input. It features three operating modes:
Smart: accelerated water activity measurement with automatic end of measurement.
Normal: conventional water activity measurement with automatic detection of equilibrium and automatic end of measurement
Standard: water activity and temperature measurement, limited to just indicating the values and the trend of the values
HBD5ms2100 Analyzer |
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MS2123N probe |
Universal for
the measurement of gas, liquid, and solid product samples |
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Application assembly |
additional probes accessories |
order separately |
Special sensors |
additional probes |
order separately |
Standard’s Kit |
1 box each EA35 (35 %RH) and EA80 (80%RH) humidity
calibration standards |
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Carrying case |
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The
MS2123NC is compatible with all the models of MS2123 probes to permit the
direct measurement of products in bulk and quality control of packaging
materials.
The
probes used with the HBD5MS2123 analyzer can be calibrated and adjusted at one
or more points, directly from the instrument keypad. Reference humidity values
are provided by using the humidity standards.
When used with an external AC adapter, this allows powering the instrument
without draining the battery. Battery charging is possible with the appropriate
type of battery.
Standard Probe
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MS2123N SensorUniversal sensor
for gases, liquids, solids application Size: Dia.: Ø24;
Length:300mm Weight: 300g Working temperature:
<85 ºC |
Additional Probes
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FixFit NPT 1”For fixing to
pipe or temporary device. Also needed for
AW2123N-Cap Size: Dia.: Ø42;
Length:30mm Weight: 300g Connect: NPT1”/ZG1”. Material: SUS316 |
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MS2123N-CapFor powder samples, accessory to HMS2123N |
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MS2123-Clamp Kitfor measurement
of powder and bulk samples Requires use of a sample holder and disposable sample cups |
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MS2123-Vap Kitfor measurement
of powder and bulk samples with vaporization of the crystallized water internal
of the samples. Heating
Temperature: Max 100 ºC Requires use of a sample holder and disposable sample cups, supply of 300W AC power. |
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DSC KitAccessory for
Clamp Kit and Vap Kit pack of 100 disposable sample cups (14mm deep) |
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