Datasheet

7
Common product advantages: testo 435 Additional benefits of the versions
• Wide selection of probes:
– IAQ probe for assessing ambient air quality based on CO2, air
temperature, ambient air moisture and absolute pressure
– Thermal probes with built-in temperature and air moisture
measurement
– Vane and hot wire probes
– Radio probes for temperature
• Easy operation with user profiles
• Printout on Testo printer
– for flow measurement using Pitot tubes
– for monitoring filters
– Instrument store for 10,000 readings
– PC software for analysing, filing and documenting measurement
data
– Radio probe also for humidity
– Lux probe connection possible
– Comfort level probe connection possible
– U-value probe connection possible
testo 435 - The new all-rounder
The all-rounder
testo 435 is the new multi-
function measuring instrument
which analyses Indoor Air Quality
to tune air conditioning systems.
The new IAQ probe measures
Indoor Air Quality using the
parameters CO
2
, % relative
humidity and ambient air
temperature. Absolute pressure is
also available. The degree of
turbulence probe is used to
achieve an objective assessment
of ambient air flow. The new Lux
probe measures light conditions
in the workplace and the
repetition frequency of monitors.
The surface probe and air
moisture probe are used to show
where dewpoint has been
exceeded and mould has
developed. The heat transfer
coefficient (U-value) is measured
using the U-value temperature
probe and a radio probe.
Temperature and humidity
measurement are built-in in the
new thermal probe. In this way,
flow speed, volume flow, air
humidity and air temperature can
be measured in one procedure.
Different measurement principles
(hot wire, vane and Pitot tube
measurement) can be used
depending on flow speed and
application.
Improved user comfort thanks to
user profiles
testo 435 is easy to operate.
User profiles for typical
applications such as duct
measurement and IAQ
measurement are stored in the
instrument making time-
consuming programming in the
instrument no longer necessary.
Reliable measurement data
documentation
Measurement logs provide the
customer with data from duct,
long-term and degree of
turbulence measurements. The
company logo can be included
on the form. Readings can be
printed cyclically in testo 435-1
and -3 on your Testo printer.
Radio probes
for temperature
and humidity
You have the option of
transmitting readings wirelessly
via radio from the probe to
measuring instrument over a
distance of up to 20 m (without
obstructions). The lack of cable
means more convenience and it
cannot get dirty or damaged.
The right instrument for every
application
The new testo 435 is available in
four versions. Depending on the
application, you can choose from
versions with built-in differential
pressure measurement as well as
versions with additional
instrument functions such as
instrument memory, PC software
and an extended range of
probes.
• Built-in differential pressure measurement (435-3/-4, cannot be
upgraded)
testo 435-1
Part no. 0563 4354
testo 435-4, multi-functional meas.
instr. with built-in differential pressure
measurement for A/C, ventilation and
Indoor Air Quality with readings
memory, PC software and USB data
transmission cable, with battery and
calibration protocol
testo 435-4
Part no. 0563 4352
testo 435-2, multi-functional
measuring instrument for A/C,
ventilation and Indoor Air Quality with
readings memory, PC software and
USB data transmission cable, incl.
battery and calibration protocol
testo 435-2
Part no. 0560 4351
testo 435-1, multi-functional meas.
instr., for A/C, ventilation and Indoor
Air Quality, with battery and calibration
protocol
Built-in differential pressure
measurement
Extended instrument functionsExtended instrument functions
testo 435-3
Part no. 0560 4353
testo 435-3, multi-functional
measuring instrument with built-in
differential pressure measurement for
air conditioning, ventilation and Indoor
Air Quality, with battery and calibration
protocol
Technical data
Accuracy
±1 digit
±0.2 °C (-25 to +74.9 °C)
±0.4 °C (-50 to -25.1 °C)
±0.4 °C (+75 to +99.9 °C)
±0.5% of mv (remaining
range)
Meas. range -50 to +150 °C
Probe type NTC
Resolution
Overload
0.1 °C
±0.3 °C (-60 to
+60 °C)
±(0.2 °C +0.3% of
mv) (remaining
range)
-200 to +1370 °C
Type K (NiCr-Ni)
0.1 °C
435-2/-4
0 to +100000 Lux
Lux
435-3/-4435-1/-2/-3/-4 435-1/-2/-3/-4
±0.02 hPa (0 to +2 hPa)
1% of mv (remaining
range)
0 to +25 hPa
Differential pressure
probe, internal
0.01 hPa
200 hPa
Oper. temp. -20 to +50 °C
Storage temp. -30 to +70 °C
Battery life
200 h (typical vane
measurement)
Dimensions 225 x 74 x 46 mm
Built-in differential pressure
measurement
See probe data
1 Lux / 0.1 Hz
Technical data for thermal, vane and IAQ probes see probe data (next page)
• Extended instrument functions (435-2/-4, cannot be upgraded)