BP21 Infrared thermometer

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  5. BP21 Infrared thermometer

BP21 Infrared thermometer

Non-contact temperature measurement – quick and precise

Minimum cost – maximum performance:

The BP21 impresses with first-rate performance data in this device class, e.g. with a wide temperature range, optical resolution of 12:1, degree of emission adjustable according to the specific material and with an innovative dual laser automatically visualizing the measuring spot size.

After no more than a few seconds the BP21 is ready for operation and quickly and reliably captures temperature values ranging from -35 °C to +800 °C.

The pyrometer can not only hold the current measured value, but also display maximum or minimum value, and it can be programmed with individual limit values, upon the exceedance of which an acoustic alarm signal will be emitted automatically.

The user-friendly design and comprehensive equipment features make the BP21 a versatile infrared thermometer for industrial, handicraft and hobby applications.

A few practical benefits:

  • Development, design, production: 100 % Trotec
  • Non-contact surface temperature measurement from -35 °C to +800 °C
  • Degree of emission freely adjustable from 0.1 to 1.0
  • Measuring optic 12:1
  • Excellent value for money
  • Measuring spot diameter display due to dual laser technology
  • Maximum or minimum value and hold function
  • Backlit display
  • Alarm function
  • Automatic switch-off
  • Practice-optimized German industrial design – protected design patent


BP21 Pyrometer show in Trotec online shop

BP21 Pyrometer

You save: 30 %

59.95 £ 41.95 £ incl. VAT Show net price (VAT not included)


Technical data

Technical data
General information
  Article number 3.510.003.031
  Optical resolution (D:S) 12:1
  Smallest measuring spot Ø 12.5 mm (Distance 150 mm)
Infrared temperature sensor [°C]
  Min. measuring range | Infrared temperature sensor [°C] -35
  Max. measuring range | Infrared temperature sensor [°C] 800
  Max. accuracy [°C] | Infrared temperature sensor ± 2 °C or ± 2 % Of measured value
  Accuracy < -4°C
  Accuracy -4°C to 65 °C
  Accuracy > 65 °C
  Accuracy < 20 °C
  Accuracy = 20 °C
  Accuracy -50 °C to 20 °C (-58 °F to 68 °F)
  Accuracy 21 °C to 300 °C
  Accuracy 301 °C to 1,000 °C
  Accuracy 21 °C to 400 °C
  Accuracy 401 °C to 800 °C
  Accuracy 800 °C to 1,600 °C
  Repeatability -50 °C to 20 °C
  Repeatability 21 °C to 1,000 °C
  Repeatability 21 °C to 1,200 °C
  Repeatability 1,201 °C to 1,600 °C
  Accuracy 20 °C to 500 °C (68 °F to 932 °F)
  Accuracy 500 °C to 1,000 °C (932 °F to 1,832 °F)
  Accuracy 1,000 °C to 1,850 °C (1832 °F to 3,362 °F)
  Repeatability 20 °C to 1,000 °C (68 °F to 1,832 °F)
  Repeatability 1,000 °C to 1,850 °C (1832 °F to 3,362 °F)
Infrared temperature sensor [°F]
  Min. measuring range | Infrared temperature sensor [°F] -31
  Max. measuring range | Infrared temperature sensor [°F] 1,472
  Accuracy min. [%] 1.5
  Accuracy ± min. [°F] 4.5
  Accuracy Max. [%] 1
  Accuracy ± Max. [°F] 1.8
Integrated temperature probe [°C]
  Min. measuring range | Integrated temperature probe [°C]
  Max. measuring range | Integrated temperature probe [°C]
  Accuracy ± min. [°C]
  Accuracy ± Max. [°C]
  Accuracy ± 0 °C to 200 °C (32 °F to 392 °F) [°C]
  Accuracy ± =0 °C [°C]
Integrated temperature probe [°F]
  Min. measuring range | Integrated temperature probe [°F]
  Max. measuring range | Integrated temperature probe [°F]
  Accuracy ± < 23 °F to 150 °F [°F]
  Accuracy ± > 150 °F [°F]
Dew point temperature [°C]
  Min. measuring range | Dew point temperature [°C]
  Max. measuring range | Dew point temperature [°C]
  Min. measuring range | Humidity [%]
  Max. measuring range | Humidity [%]
  Accuracy [%] | Humidity
Ambient conditions
  Operation - min. temperature [°C] 0
  Operation - max. temperature [°C] 50
  Operation – min. relative humidity [% RH] 10
  Operation approx. - max. relative humidity (non-condensing) [%] 90
  Storage - min. temperature [°C] -10
  Storage - max. temperature [°C] 60
  Storage - max. relative humidity (non-condensing) [%] 80
  Plug connection for type K temperature sensor
Memory organisation
  Internal flash memory
Device control
  Push buttons
  Membrane keyboard
Type of protection
Temperature sensor
  Response time 0.3 s
  Spectral sensitivity 8 - 14 µm
Laser (target display)
  Class 2 (II)
  Wavelength [nm] 630 ~ 670
  Power [mW] 1
Power supply
  Internal (battery) 1 x 9 V battery
  Internal (battery)
  External (USB)
Housing design
  Length (packaging excluded) [mm] 150
  Width (packaging excluded) [mm] 45
  Height (packaging excluded) [mm] 108
  (packaging excluded) [kg] 0.177
Standard scope of delivery
Standard scope of delivery
  Measuring device
  Operating manual
  Contact temperature sensor type K
  Carrying case
  USB cable
  Mini tripod
Ascertainable measured values and functions
Functions and features
  Material temperature [°F]
  Material temperature [°C]
  Air temperature [°C]
  Air temperature [°F]
  Relative humidity [%]
  Dew point temperature [°C]
  Dew point temperature [°F]
Internal sensors
  Minimum value display
  Maximum value display
  Measured value hold function
  Switching function °C/°F
  Automatic switch-off
  Backlit display
  Selectable dual laser
  Alarm function with user-defined limit values
  Acoustic alarm function
  Non-stop measuring function
  Differential value display
  HACCP quick indicator LED
  Maximum value indication
  Open targeting sights
  Additional temperature measurement using external type K sensor
  Additional material temperature measurement using integrated type K insertion sensor
  Applicable for software-supported recording of measurement series
  Tripod thread connection
  Meets the specifications of the LFGB, §31 (German Food and Feed Code)
  Conforms with DIN 10955:2004
  Selectable single laser pointer
  Battery status indication
  Degree of emission fixed at 0.95
  Acoustic dew point alarm
  Visual dew point alarm
  Timer function
  Bar graph indicator for the quick identification of condensation risks
  Material temperature [°C]
  Material temperature [°F]

 standard equipment

 optionally available

 not available



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