TESTO 645 Instruction Manual page 39

Pressure probe for measuring velocities gand diffe-
rential pressure or absolute pressure
Accessories for pressure
probes
Pitot tubes to measure velocity (in connection
with pressure probes); longer versions on request
Silicone hose to connect Pitot tube and pressure
probe, 5 m long
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Accessories for humidity/temperature probes, 3-function probe
Caps for all humidity probes
Metal protection cage, material: stainless steel V4A. Quick adjustment time, robust and tempera-
ture-proof. Application: for velocities < 10 m/s
Cap with wire mesh filter.
PTFE sintered filter, PTFE material. Not affected by condensation, water-repellent, resistant to cor-
rosive substances. Applications: compressed air measurements, high humidity range (long-term
measurements), high velocities.
Stainless steel sintered cap, material: V2A stainless steel. Very robust, suitable for penetration, should
be cleaned with fresh air, mechanical protection of sensor. Application: large mechanical loads, high
velocities.
Additional accessories
Connection cable for probes with plug-in head, 1.5 m long, PUR coating material
Connection cable for probes with plug-in head, 5 m long, PUR coating material
Extension cable between plug-in head cable and instrument, 5 m long, PUR coating material
Telescope for probes with plug-in head, extension length: maximum 1 m, cable: 2.5 m, PUR coating
material
Control and adjustment set 11.3 % / 75.3 % for humidity probes and 3-function probe (please order
0554.0661 adapter for 3-function probe)
Control and storage humidity (33 %) for humidity probe and 3-function probe
Pressure probes
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Probes for testo 645 / 445
Measuring range Accuracy
-4 to 10 hPa ±0,03 hPa
-40 to 100 hPa ±0,1 hPa (0 to 20hPa)
±0,5% of m.v. (rem.)
2000 hPa (Abs.p) ±5 hPa
Temp.max Material
+350 °C Chromium-plated brass
+350 °C Chromium-plated brass
39
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Ordering data
Diameter Part no.
21 mm 0554 0665
12 mm 0554 0755
12 mm 0554 0757
21 mm 0554 0666
12 mm 0554 0756
21 mm 0554 0640
12 mm 0554 0647
0430 0143
0430 0145
0409 0063
0430.0144
0554 0660
0554 0636
Connection cable Part no..
1,5 m, PUR 0638.1445
0638.1545
0638.1645
Length / Ø Part no..
500 mm/7 mm 0635.2045
350 mm/7 mm 0635.2145
0554.0440
1.888.610.7664
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