Gas sampling - Dilution units - Dilution gas sample probes, dilute the gas directly at the sample point, dilution ratio 500:1 down to 10:10 pages

M&C | TechGroup Germany GmbH
Rehhecke 79, D-40885 Ratingen
info@mc-techgroup.com
www.mc-techgroup.com
Fon +49 (0)2102 935-0
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2-1.1.7 07.97/06.06
Application
The electrically heated M&C dilution probe
is applicable for such processes, where the
measuring procedure or the handling of
the process gas require the dilution of the
sample respectively the component to be
measured.
Typical applications are the use with toxic
gases, the moisture measurement and the
emission measurement in flue gases.
The M&C dilution probe SP2000H/DIL... is
based on the well tested M&C gas sample
probe SP2000H. This enables the user to
adapt the probe to nearly every application,
using for example special filter techniques
or special materials.
Description
The dilution unit including the critical orifice
is integrated in the probe outlet, heated up
with the probe to a stable temperature. The
incorporated pre-heater heats up the dilution
gas to the probe temperature. Both steps
avoid that sample gas decreases under the
dewpoint. Calibration gas enters the probe
via an integrated connection. The probe
can be heated up to 180 °C or 320 °C. As
an option a heated manual operated 2 way
ball valve is available. It is integrated in the
sample gas inlet and shuts off the probe
head from the process, for example during
the change of the filter element.
The necessary dilution gas pressure can be
adjusted by the precision pressure controller
with pressure gauge.
A vacuum pressure gauge indicates the
function of the dilution system.
The pressure controller and pressure gauges,
necessary for the dilution function, have to
be ordered separately. Set -A can be directly
mounted to the probe. The external control
unit -S is equipped with an additional shutoff
ball valve and a flowmeter to adjust the
test gas quantity. The sets -A1 respectively
-S1 include an additional pressure controller
for the option bypass injector -B or -BR.
Gas Sample Probe Series SP®
Version SP2000H/DIL... and SP2000H320/DIL...
Gas Sample Dilution Probe
Special Features
Based on probe SP2000H/....
Electrically heated up to 180 °C or
320 °C
External critical orifice is heated
Including a dilution gas pre heater
No dew point problems
Dilution ratios from 10:1 up to 500:1
With check gas connection
Independent of the process
temperature
Easy operation and maintenance
The dilution probe realises dilution rates in
a range of 10:1 to 500:1. A high dilution rate
causes a low sample flow from the process.
With underpressure conditions the response
time can be minimised using the optional
heated bypass injector -B which is integrated
directly upstream the dilution unit.
It is available with recirculation into the process
-BR as well. With overpressure a bypass
needle valve -BV controls the bypass flow.
The construction of the probe guarantees
an operation which is independent from the
process temperature and is easy to maintain
as well.
SP2000-H/DIL