Fiber-Type ThermometerBF Series


<End of sales by May 2019>

High frequency equipment for fiber type

  • Wide measurement range
  • Simple emissivity adjustment: Teaching function
  • 50 ms high-speed response
BF Series


Model BF-30I-A
400 to 1200°C (752 to 2192°F)
Field of view ø30 mm/1000 mm (with standard lens attached)
Optics Glass-based infrared light fiber
Sensing element/
spectral response
InGaAs/1.2 to 2.6 μm
Response time 50 ms/90% response
Accuracy*1 (ε≒1.0) ±2% of reading value
Repeatability ±1°C (1.8°F)
Display resolution 1°C (1°F)
Analog output 4 to 20 mA
Output resolution Equivalent to 0.1 to 0.5°C (0.18 to 0.9°F)
(output width: 100 to 800°C (212 to 1472°F))
Emissivity (ε)
0.10 to 1.20
Response time
selection (DELAY)
1 to 200
Supply voltage/
current consumption
12 to 24 VDC ±10%/100 mA or less (at max. load)
0 to 50°C (32 to 122°F) (main unit),
0 to 150°C (32 to 302°F) (Fiber tip part)
Ambient humidity 35 to 85% RH (no condensation)
Storage temperature –10 to +60°C (14 to 140°F)
Vibration resistance 10 to 55 Hz; amplitude 1.5 mm; 2 hours in each of the
X, Y, and Z directions
Water resistance IP65
Material [Main unit] Ring/housing: Glass-filled PBT, Rear: PSF, Cover: PC;
Fiber: SUS; Lens attachment: BS/NI plating
EMC EMC Directive (2014 / 30 / EU)
Environment RoHS Directive (2011 / 65 / EU), China RoHS (MIIT Order No.32)
Applicable standards EN 60825-1
Weight Approx. 500 g
Mounting bracket ×1, mounting screw (M4) ×2,
Lens attachment mounting nut (M16) × 2

*1 The measurement accuracy in the specification is (strictly) limited to the calibration conditions of our factory.
・Note that specifications are subject to change without prior notice for product improvement purposes.

Field of view

(Unit: mm)
  • BFL-30 / standard lens

  • With no lens attached (fiber only)

・The device is calibrated to the standard lens upon shipment.
When using an optional lens or the fiber only, TEACH/ε (emissivity) adjustment must be performed.
・The field of view stated above are measurement diameters with an optical response of 90%.
・The size of the measurement target must be sufficiently larger than the measurement diameters shown in the above diagram.