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The reference testo 400
Multi-function
The right probe for every application
Comfort probe for measurements of degree of turbulence according to EN 13779
Robust hot bulb probe for direction-independent flow measurement
Vane probes 60/100 mm for integrating measurements at outlets
12/16/25 mm – vane probes for measurement in ducts with temperature measurement
Straight and Prandtl Pitot tubes for measuring the flow velocity in dirty air and temperatures
up to +600 °C
Comfort level measurement
• high accuracy for determining the
degree of turbulence of ± (0.03
m/s +4% of reading)
Flow velocity measurement
• First laboratory for flow velocity
accredited by the PTB ensures
secure measurement values
• Reference laser-Doppler anemometer
ensures calibration accuracy
from 0.05 % of reading
• Thermal probes for a high accuracy
up to ± (0.03 m/s + 5% of
reading) in the measuring range
up to 20 m/s
• Density-independent measurement
from 500 hPa absolute
pressure or to 350 °C ambient
temperature with vane probes in
the measuring range from 0.4 m/s
to 60 m/s
Thermal anemometer probe, Ř 10 mm, w. telescopic handle, measures air flow in
lab fume cupboards to DIN EN 14175
Temperature measurement
• DKD laboratory for temperature
accredited by the PTB guarantees
secure measurement values
• First DKD laboratory for surface
temperature accredited by the
PTB, developed together with the
PTB and the University of Ilmenau
• Cross-band probe for fast surface
measurements
• Customized temperature probes
for your application
• System accuracy up to 0.05 °C
with precision probe 0614 0240
Current-voltage measurement
• Additional connection of external
measurement transmitters such
as particle counters and pressure
transmitters, and scaling in the instrument
CO and CO2 measurement
• Long-term stable 2 beam method
for measuring the reference and
the measurement channel for CO2
Highly accurate immersion/penetration probe with a system accuracy of 0.05 °C
in the measuring range from 0 to 100 °C and a resolution of up to 0.001 °C
Fast reaction surface probe for measuring surface temperature
Precision air probe for measuring the air temperature
CO2 probe for determining indoor air quality and monitoring the workplace
Current/voltage cable (± V, ± 10 V, 20 mA) for example for checking stationary
measurement transmitters
Highly accurate reference humidity/temperature probe for highest accuracy requirements
1 %RH
Humidity measurement
• The first DKD laboratory for air
humidity and dewpoint temperature
accredited by the PTB guarantees
secure measurement
values
•Worldwide patented (capacitive)
Testo humidity sensor
• Inter-labortory tests in national
and international institutes confirms
a sensor accuracy of ±1
%RH
• 2 years guaranteed long-term
stability of the Testo humidity
sensor under normal conditions
• Easy calibration or adjustment of
Pressure measurement
• Very high accuracy in the lower
measuring range (100 Pa) of ±
(0.3 Pa + 0.5 % of reading)
• Temperature-compensated pressure
measurement
aw-value set: pressure-tight precision humidity probe for determining awvalue
Flexible humidty probe with mini-module for measurements e.g. at material test
benches
Precision differential pressure probe 0 to 100 Pa
Absolute pressure probe 0 to 2000 Pa
• Straight Pitot tubes with considerably
improved accuracy compared
to Prandtl Pitot tubes through
a Pitot tube facto of 0.67
the humidity probe (on site) with
defined saline solutions (11.3
%RH, 33 %RH and 75.3 %RH)
Thin humidity probe incl. 4 attachable protection caps for ambient air measurements,
measurements in exhaust air ducts and equilibrium moisture measurements
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