Fluke Calibration 1551A Ex, 1552A Ex Data Sheet

1551A Ex/1552A Ex Intrinsically

Safe “Stik” Thermometers

The best alternative to mercury thermometers

Finally, a digital substitute for your mercury-in-glass thermometers! Accurate and repeatable to ±0.05 °C over
its full range, the Fluke Calibration 1551A/1552A “Stik” Thermometer is the new “gold standard” of industrial
temperature calibration.

• Accuracy of ± 0.05 °C (±0.09 °F) over full range

• Intrinsically safe (ATEX and IECEx compliant)

• Two models to choose from (–50 to 160 °C or –80 to 300 °C)

• Display temperature in °C or °F

• 300-hour battery life

What’s wrong with my mercury thermometer?

Although mercury thermometers are accurate, they are also fragile and pose the risk of a mercury spill.
Many U.S. states and European Union countries have banned their use in industrial applications. The U.S.
Environmental Protection Agency has funded research to identify alternatives. But such initiatives have been
hampered by the lack of an electronic alternative that was intrinsically safe, repeatable and accurate. The Fluke
“Stik” Thermometers help solve this problem by providing the measurement accuracy, durability and safety
required in industries such as oil and gas production and petrochemicals—with no mercury hazard.

Why calibrate process
temperature sensors?

Because temperature effects the accuracy of a volumetric
measurement, process manufacturers of chemical, pharmaceutical,
food or petroleum products require accurate temperature
measurements—especially for processes where quality or custody
transfer are regulated by government agencies. Since all temperature
sensors are subject to drift with time, regular calibration or verification
against a reliable reference thermometer is required.

Thermometer probe and digital
readout combined into one unit

The stainless steel probe and digital readout of the Fluke 1551A
Ex/1552A Ex “Stik” Thermometers are fixed together and calibrated
as a system. Unlike competing products, the large backlit LCD display
rotates 90 degrees, making it easy to read from any angle. A user­configurable stability/trend indicator lets the technician know when
the temperature is stable enough to record an accurate measurement.
A low-battery indicator and stop-measure function prevent erroneous
measurements from being made due to low battery life. Data logging
to internal memory of up to 10,000 time-stamped measurements is
optionally available.

Specifications

Temperature range –50 °C to 160 °C

1551A Ex 1552A Ex

–80 °C to 300 °C

(–58 °F to 320 °F)

(–112 °F to 572 °F)

Accuracy (1 year) ±0.05 °C (± 0.09 °F)

Display units °C, °F

Sensor type 100 Ω thin-film RTD 100 Ω wire-wound PRT

Probe temperature

0.00385 Ω/Ω/°C nominal

oefficient

Minimum immersion depth

1

7 cm (2.8 in) 12 cm (4.8 in)

Probe sheath material 316L stainless steel

Temperature resolution Selectable: 0.1, 0.01, 0.001 (default 0.01)

Operating temperature

–10 °C to 50 °C (14 °F to 122 °F)

range readout

Optional data logging2 Up to 10,000 time-stamped readings stored

to internal memory

Communications RS-232 stereo jack

(access calibration parameters only)

Power 3-AAA batteries, typical battery life of

300 hours without LCD backlight

Electronics dimensions
(HxWxD)

114 x 57 x 25 mm

(4.5 x 2.25 x 1.0 inches)

Weight 196 g (6.9 oz)

Calibration (included) NVLAP-accredited, NIST-traceable

1

Per ASTM E 644

2

See ordering information for optional data logging configurations

Ex Ib IIB T4 Gb

(-10 °C ≤ Ta ≤ +50 °C)

ITS10ATEX27114X
Ex Ib IIB T4 Gb

11 2 G

IECEx ITS10.0049X

Fluke Calibration.

Precision, performance, confidence.

™

Ordering information

1551A Ex

1551A-9 Thermometer, Fixed RTD, -50 °C to 160 °C,

4.8 mm x 229 mm (3/16 in x 9 in)

1551A-12 Thermometer, Fixed RTD, -50 °C to 160 °C,

6.35 mm x 305 mm (1/4 in x 12 in)

1551A-20 Thermometer, Fixed RTD, –50 °C to 160 °C,

6.35 mm x 508 mm (1/4 in x 20 in)

1552A Ex

1552A-12 Thermometer, Fixed PRT, -80 °C to 300 °C,

6.35 mm x 305 mm (1/4 in x 12 in)

Accessories

1551-CASE Case, 1551-2, Carrying

Standard accessories include: NVLAP-accredited report of calibration,
User’s Guide on CD-ROM, three AAA batteries

Note: Model number appended with a -9, -12, -20 indicates probe sheath
length in inches. All probe diameters are 6.35 mm (1/4 in) with the
exception of the 1551A-9, which is 4.8 mm diameter (3/16 in).

Data logging options: append “–DL” to your model number of choice to
configure your “Stik” Thermometer with the data logging option.

Fluke Calibration
PO Box 9090, Everett, WA 98206 U.S.A.

Fluke Europe B.V.
PO Box 1186, 5602 BD
Eindhoven, The Netherlands

For more information call:
In the U.S.A. [phone] or
Fax [phone]
In Europe/M-East/Africa [phone] or
Fax [phone]
In Canada (800)-36-FLUKE or
Fax [phone]
From other countries [phone] or
Fax [phone]
Web access: http://www.fluke.com

©2011 Fluke Corporation.
Specifications subject to change without notice.
Printed in U.S.A. 6/2011 4042406A F-EN-N
Pub-ID 11801-eng

Modification of this document is not permitted
without written permission from Fluke Corporation.