Datasheet

85
Overview of Testo transmitters
Instrument
versions
Measurement
sensor
Temperature transmitter testo
6920
Humidity and temperature transmitter testo
6621
Differential pressure transmitter
testo 6321
Wall version with display Wall version without display Wall version with
display
Wall version
without display
Duct version without displayWall version with external
probe and display
Wall version with
target value setter
wide selection of temperature sensors
(Pt100/1000, NTC, NI1000)
Testo humidity sensor, NTC (active temperature
sensor), NI1000 (passive temperature sensor)
Piezoresistive sensor
Properties
- easy operation via P2A software
and fast on-site adjustment
- easy operation via P2A software and fast on-site
adjustment
- patented robust humidity sensor
- large selection of protective filters
- easy operation via P2A software and
fast on-site adjustment
- extermely long-term stable sensor
Measuring range
0 to+70 °C (active without display)
0 to +50 °C (active with display)
-20 to +70 °C (passive sensors)
Humidity: 0 to 100%RH (> 90%RH short-term)
Temperature: 0 to 60 °C (wall version)
-20 to 70 °C (duct version)
2 to +2 bar selectable in the ranges 100 to
+100 Pa
Outputs
4 to 20 mA (±0.05 mA)
0 to 1 VDC (±2.5 mV)
0 to 5 VDC (±12.5 mV)
0 to 10 VDC (±25 mV)
passive output optional
4 to 20 mA (±0.05mA); 2-wire
0 to 1 VDC (±2.5mV); 4-wire
0 to 5 VDC (±12.5 mV); 4-wire
0 to 10 VDC (±25 mV); 4-wire
Passive temperature output optional
Scaling range: -50 to +100 °C / -50 to +100 %RH
4 to 20 mA (±0.05mA); 4-wire
0 to 1 VDC (±2.5mV); 4-wire
0 to 5 VDC (±12.5 mV); 4-wire
0 to 10 VDC (±25 mV); 4-wire
Accuracy
±0.5 °C 1.2 % of measuring range (+ 0.3 Pa basic
error)
0.05 % of measuring range per Kelvin
deviation from 22 °C
Duct version
with display
Wall version with
display and buttons
Duct version without
display
Humidity: ±2.0%RH (0 to 90%RH),
±4.0%RH (> 90 to 100%RH)
Temperature activ:e ±0.5 °C
Temperature passive, tolerance Ni1000
〈 0 °C: 0.4 °C + (0.028 x ltl)
> 0 °C: 0.4 °C + (0.007 x ltl)
Ideal building air conditioning depends above all on
the measurement and regulation of temperature, humidity and
differential pressure.
The Testo transmitters are ideal for the
monitoring and regulation o
f climate, e. g. in:
Ideal air conditioning in museums
- Industrial and commercial buildings (e. g. production, storage),
- Offices and administrational buildings,
- Sales outlets and exhibition halls,
- Museums and libraries,
- School buildings, hotels, clinics etc.
Monitoring ambient conditions in
ducts
Monitoring ambient conditions in
warehouses
Monitoring ambient conditions in
offices
Measure temperature, humidity and differential pressure