Committing to the future
testo 845
Infrared Thermometer with Measurement Point Marking
Switchable optics for far field and close focus non-contact temperature measurement
NEW!
°C
Applications:
• Heating
• Air conditioning
and ventilation
• Manufacturing
• Machines
• Plus much more!
Benefits:
• Far-field and close
focus non-contact
temperature
measurement
• 2 in 1 instrument
offering significant
cost savings
• Broad
measurement
range of
-35 to +950 °C
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Precise small measurement point for both near and
far distances using new SWITCH optics.
The Testo 845 is a milestone in non-contact temperature measurement offering the ability to ‘switch’
between close focus and far-field measurements. For the first time, surface temperatures with a
measurement point diameter down to 1mm can be measured and cross laser marking means that
accurate measurements can be taken even at large distances.
The Testo 845 infrared thermometer offers fast temperature measurement. Min./max. values and
exceeded limit values are updated at a time interval of 100 ms, enabling quick scans and evaluations
1
of surfaces.
The Testo 845 guarantees a high level of accuracy in non-contact temperature measurement. In the
temperature range from -35 to +950 °C, a measurement accuracy of up to ±0.75 °C is achieved.
External thermocouple probes can be attached and used for measuring temperatures when the degree
of emission is not known. The Testo 845 also offers an adjustable emissivity factor from 0.1 to 1.0.
75:1 Far-field optics with cross laser for large distances:
1
For measurements at greater distances, the Testo 845 is equipped with 75:1 optics. A laser cross
marks the exact measurement point at any distance. This ensures that the diameter of the
measurement point is recognisable at all times during measurement therefore eliminating the risk of
incorrect measurements.
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Measurement point diameter and distance from the measurement surface
Switching:
The optics are switched from far-field to close focus with the slide switch.
Close focus optics with 1 mm measurement point for small distances:
2
With the close focus optics measurement of surface temperatures with a point diameter up to 1 mm can be
undertaken. A 2-point laser marks the exact of the measurement point.
Measurement point diameter and distance from the measurement surface
Innovation in non-contact
temperature measurement
· SWITCH optics for both far-field and close focus
temperature measurement
· Cross laser marking for accurate long distance
measurement
· Measuring range –35 °C to +950 °C
· Reference accuracy up to ±0.75 °C with ultra-fast
measurement technology (scanning 100 ms)
· Connection of external thermocouple probes
· Documentation via software or on site with optional
infrared printer
· Optical and audible alarm when limit values are
exceeded
Display view infrared measurement:
current value, min./max.value
Display view with attached °C contact probe:
degree of emission, current value °C infrared
measurement and °C contact probe
switchable optics
for far-field/close focus
measurement
Simple instrument operation
with a clear display
· 3-line backlit display showing °C,
min./max. values of the alarm limit values
and emissivity
· Optical and audible alarm when user
adjustable limit values are exceeded
· Onboard memory for 90 measurement
protocols
Record and save measurements
PC software for archiving and documenting measurement data
A
The stored measurement protocols (max. 90) are read into the PC software via USB cable. The
convenient PC software is used to archive, document and further process the measurement data
(e.g. Excel, Visual Basic).
Online measurements are also possible with the Testo 845 and the PC software. A bracket allows
the Testo 845 to be securely fitted into the tripod during measurement. Data transfer from the
instrument to the PC takes place in a time interval from 100ms. Voltage supply during online
measurement takes place via USB or battery.
PC software, USB cable and tripod adapter are included in delivery as standard.
Documentation on site with the Testo infrared printer
B
The Testo 845 transfers the data wirelessly to the report printer via infrared interface. In addition to
the measurement values the date and time are also documented on the printout.
A
B
Technical and ordering data
Testo 845
Measuring range °C: IR °C: -35 to+950 °C
Spectral range: 8 to 14 µm
Accuracy °C IR (at +23 °C): ±2.5 °C (-35 to -20.1 °C)
± 1 digit: ±1.5 °C (-20 to +19.9 °C)
Accuracy °C contact (Type K): ±0.75 °C (-35 to +75 °C)
± 1 digit: ±1 % of m.v. (75.1 to +950 °C)
Resolution: 0.1 °C (°C-measurement parameters)
Emission factor: Adjustable 0.1 to 1.0
Optical resolution: Far field: 75:1 (16 mm, distance 1200 mm)
Measuring rate: t 95: 150 ms
Housing material: ABS black/grey, metal cover
Dimensions: 155 x 58 x 195 mm (LWH)
Weight: 465 g
Dimensions case (included in delivery) 405 x 340 x 93 mm (LWH)
Voltage supply: 2 x AA AIMn or via USB
Battery life: 25h (without laser); 10h (with laser without backlight); 5h (with laser and 50% backlight)
Operating temperature: -20 to +50 °C
Storage temperature: -40 to +70 °C
Warranty: 2 years
Contact °C -35 to +950 °C
±0.75 °C (+20 to +99.9 °C)
±0.75 % of m.v. (+100 to +950 °C)
Close focus: 1 mm, distance 70 mm
Scanning Max/Min/Alarm: 100 ms
Testo 845 Part no.
Testo 845, infrared temperature measuring instrument including carry strap,PC software, USB-data transfer cable,
aluminium transport case, battery and calibration protocol 0563 8450
Temperature probes (TE Type K)
Very fast reaction surface probe with sprung thermocouple band, also for uneven surfaces, measuring range short-term up to +500°C,TC Type K 0602 0393
Very fast reaction surface probe with sprung thermocouple band, bent, also for uneven surfaces, measuring range short-term up to +500°C,TC Type K 0602 0993
Precise, waterproof surface probe with small measuring head for flat surfaces, TC Type K 0602 0393
Robust air probe, TC Type K 0602 1793
Accessories
Mains unit, 5 VDC 500 mA with European plug 0554 0447
External charger including 4 Ni-MH rechargeable batteries with integrated international plug –100-240 V, 300 mA, 50/60 Hz, 12 VA/instrument 0554 0610
Testo infrared printer with 1 roll of thermal paper and 4 AA batteries 0554 0547
Spare thermal paper for printer (6 rolls) 0554 0569
Spare thermal paper for printer (6 rolls), long-term legible measurement up to 10 years 0554 0568
Adhesive tape for polished surfaces (roll, L.: 10 m,W 25 mm), E=0.93, temperature-proof to +300 °C 0554 0051
Silicone heat paste (14g), Tmax = +260 °C, for improving heat transfer in surface probes 0554 0004
Calibration certificates
ISO calibration certificate temperature, infrared thermometer,calibration points +60 °C,+120 °C,+180 °C 300520 0038
User specified points On request
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