Catálogo Hanna Instruments V31

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1999
World’s first pH/temperature tester
with dual-level LCD
The pHep®4 and 5 were the second generation of the original pHep.
These meters used a large dual-level LCD that allowed many advance
features that would only be found on more expensive portable and
benchtop instrumentation. The Dual level LCD was able to display
both pH and Temperature simultaneously along with a battery and
stability indicators. The meters also feature automatic temperature
compensation, automatic calibration, battery percent level at start up,
waterproof, and a replaceable electrode. pHep 4 and 5 set the standard
for all instrumentation manufacturers that offer handheld testers.
2000
World’s first multiparameter
(pH/conductivity/ temperature)
pocket tester
The Combo pH/EC/TDS/Temperature meters were the first testers to
combine pH and conductivity sensors into a single meter. They offered
all the featues of the redesigned pHep handheld testers with the
addition of a graphite amperometric sensor for themeasurement of EC
and TDS. The Combo meters also had a exposed temperature sensor
that allowed for a quick and accurate temperature compensation for
both pH and conductivity measurements.
2002
World’s first colorimeter with
CAL Check™ feature
The HI95 series of portable photometers were the second generation
of our single parameter photometers. The HI93 series first generation
meters used an LED at a specific wavelength as a light source. The
HI95 series optical system was improved to use a tungsten lamp
and narrow band interference filter for a much narrower spectral
bandwidth. Hanna Instruments also incorporated a unique CAL Check
function in which a traceable secondary standard is used to check the
pre-programmed curve. If readings are outside a specified tolerance
then the unit could be calibrated with the standards and an offset to
the curve applied.
2003
World’s first pH meter with
CAL Check
Many problems in pH measurement
result from a lack of understanding
of the Nernstian response for a
pH electrode. Every pH electrode
generates a mV response in solutions
at a specific pH. By monitoring the offset
and slope characteristics of
a pH electrode during the
calibration process it is possible
to determine potential problems
The pH221 and pH222 were the
first pH meters to offer a unique CAL
Check feature. During calibration these
meters would alert the user if the probe
needs to be cleaned or the buffer is contaminated. After calibration the
probe condition (based on offset and slope) and the probe response
were displayed with a five bar indicator. The greater the number of
bars the better the condition and response.
2004
World’s first process pH meter with
integrated cellular communication
The ability for remote data acquisition is becoming of increasing
importance. Many times it is convenient to monitor a process
parameter remotely. With the HI504900 GSM module it is possible
to use a SIM card from cellular provider to transmit measurement
data over a cellular connection. The HI504 process pH/mV controller
allows for the digital transmission of data by using an RS485 serial
connection. The HI504 allows for programming responses based on
measurement criteria. These responses include the use of sending a
text (SMS) messages over the cellular connection.
Hanna Milestones
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Introduction
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about Hanna