Fluke 1551A-20 Intrinsically Safe 'Stik' Thermometer

Fluke Calibration

Fluke Calibration authorised distributor.

The RTD sensor of the 'Stik' Thermometer is housed in a rugged stainless steel sheath - you no longer have to worry about breaking a mercury-in-glass thermometer and the subsequent clean up.

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£ 579.50 rrp £ 610.00

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(£ 695.40 inc VAT.)

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Note: Model number appended with a -9, -12, -20 indicates probe sheath length in inches. All probe diameters are 6.35 mm with the exception of the 1551A-9, which is 4.8 mm diameter.

The Fluke 1551A Stik Thermometer is a precision digital thermometer that can be used as an alternative to mercury liquid-in-glass (LIG) thermometers. It can also be used as a reference standard for other types of digital or analog thermometers. Because of its intrinsically safe certification, it can be used in many of the same hazardous locations as analog thermometers.

The stainless steel probe and digital readout are fixed together and calibrated as a system. The accuracy specification is easy to understand since it includes all uncertainty components, including drift, for up to one year. The large backlit LCD display rotates 90° degrees making it easy to read from any angle.

A user-configurable stability/trend indicator lets you know when your temperature is stable enough to record an accurate measurement. A user-settable auto-off function extends typical battery life to three hundred hours. A low-battery indicator and stop-measure function prevent erroneous measurements from being made due to low battery life. A simple three-point calibration function allows you to easily and accurately calibrate the “Stik" Thermometer.


±0.05 °C accuracy over full range.
Intrinsically safe (ATEX compliant).
Display temperature in °C or °F.
Temperature trend indicator.
User-selectable resolution (0.1, 0.01, 0.001).
Large LCD with backlight.

Fluke 1551A Specifications:

  • Probe: 6.35 mm x 508 mm (1/4 in x 20 in).
  • Temperature range: -50 °C to 160 °C.
  • Accuracy (1 year): ± 0.05 °C (± 0.09 °F).
  • Display units: °C, °F.
  • Sensor type: 100Ω thin-film RTD.
  • Probe temperature coefficient: 0.00385 Ω/Ω/ΩC nominal.
  • Sensor length: < 10 mm.
  • Minimum immersion depth: 7 cm (2.8 in).
  • Probe sheath material: Stainless steel.
  • Temperature resolution: Selectable: 0.1, 0.01, 0.001 (default 0.01).
  • Communications: RS-232 stereo jack (access calibration parameters only).
  • DC power: 3-AAA Batteries, typical battery life of 300 hours without LCD backlight.
  • Enclosure rating: IP50.
  • Calibration (included): NVLAP-accredited, NIST-traceable.
  • Electronics dimensions (H x W x D): 114 mm x 57 mm x 25 mm, (4.5 in x 2.25 in x 1.0 in).
  • Weight: 196 g (6.9 oz).
  • Fluke 1551A Warranty: 1 year.


Includes: NVLAP-accredited report of calibration, User’s Guide on CD-ROM, 3 AAA batteries.

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Fluke 1551A-20 Intrinsically Safe 'Stik' Thermometer