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Reflecting Hemisphere
“Gold Cup”
Fibre Optic
HOT SURFACE
GOLD CUPTHE ULTIMATE REFERENCE PYROMETER FOR REFORMER TUBES
AMETEK LAND HAS BEEN MANUFACTURING PRECISION MEASURING EQUIPMENT SINCE 1947. WE ARE SPECIALISTS IN NON-CONTACT TEMPERATURE MEASUREMENT AND COMBUSTION MONITORING WITH APPLICATIONS ACROSS DIVERSE INDUSTRIES SUCH AS STEEL AND GLASS MAKING, POWER GENERATION AND CEMENT MANUFACTURE. As part of AMETEK Process & Analytical Instruments Division since 2006, our customers benefit from the worldwide AMETEK sales and service team.
Various non-contact infrared methods are used to measure reformer tube temperatures. However, these measurements rely on the accurate determination of tube surface emissivity, and require a method of compensating for reflections from the hotter surrounding furnace environment. Depending on how the furnace is fired, you may experience interference to these measurements caused by “dirty” furnace atmospheres.
Q U A L I T Y C U S T O M E R S O L U T I O N S
MEASURING THE TEMPERATURE OF REFORMER TUBE SURFACES
OUR SOLUTION IS THE GOLD CUP PYROMETERThe AMETEK Land “Gold Cup Thermometer” is the only instrument that can provide a repeatable, reliable reference temperature. It cancels out all the inherent errors typically found within other infrared thermometer devices. This instrument consists of a gold cup hemispherical reflector. This Gold cup reflector produces a measurement area, which is emissivity independent when placed upon the surface, making it ideal for unknown emissivity tubes.
The Gold Cup has a narrow protective edge suitable for tube contact. This edge prevents reflected radiation from the hotter surroundings from entering the cavity formed between the tube and the gold cup (see diagram).
The gold reflective hemisphere integrates the emitted and reflected radiation producing black body conditions. This enhanced energy now escapes through a small aperture in the back of the hemisphere where it is measured by the thermometer module’s silicon detector.
The thermometer module then transmits the temperature signal to the display unit. The battery powered portable display unit also powers the thermometer. The range of the thermometer is 700 to 1300 °C (1292 to 2372 oF).
HOW DOES IT WORK?
Gold Cup ProbeZT9558
© Land Instruments International, 2014
User Guide
Issue 101 August 2014
Publication Nº ZT9558-UGLanguage: English
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Reformer Tube Measurements Comparison - Gold Cup Vs. Portable IR Thermometer / Portable Thermal Imager
Gold Cup
Uncorrected Portable(MFT)
Uncorrected Thermal Imager
GOLD CUPTHE ULTIMATE REFERENCE PYROMETER FOR REFORMER TUBES
For a full list of international offices, please visit our website www.landinst.com Copyright © 2008-16 LAND Instruments International. Continuous product development may make it necessary to change these details without notice. MARCOMM0410 Gold Cup Rev 1
Land Instruments InternationalStubley Lane, Dronfield S18 1DJ United Kingdom
Tel: +44 (0) 1246 417691Email: [email protected]
www.landinst.com
AMETEK Land China Service Part A1 & A4, 2nd Floor Bldg. 1 No. 526 Fute 3rd Road East, Pilot Free Trade Zone 200131 Shanghai, China
Tel: +86 21 5868 5111 ext 122 Email: [email protected]
www.landinst.com
AMETEK Land - Americas 150 Freeport Road, Pittsburgh, Pennsylvania, 15238 United States of America
Tel: +1 (412) 826 4444Email: [email protected]
www.ametek-land.com
Applies in the UK Applies in the Us Applies in indiA
Certificate No. C1200
AMETEK Land India Service Divyasree N R Enclave,Block A, 4th Floor, Site No 1, EPIP Industrial Area Whitefield, Bangalore- 560066 Karnataka, India
Tel: +91 - 80 67823240 Email: [email protected]
www.landinst.com
USING THE GOLD CUPThe Gold Cup pyrometer is first connected to its water-cooling supply and the thermometer is connected to a display unit. Care should be taken in using this device because, when filled with cooling water it becomes very heavy. The gold cup is inserted through a port into the furnace and the cup is placed onto a tube to be measured. The temperature reading is immediately recorded before the tube has a chance to cool.
NOTE: The gold cup is not intended to replace the use of other temperature measurement methods. It is used as the reference method to which other temperature measuring devices are checked and corrected.
RESULTSThe graph (below) shows the comparison between a gold cup probe, a portable IR thermometer and a portable thermal imager. As you can see before “correction” the difference in temperature recorded (at a single point) has been recorded to be as much as 30 oC / 86 oF for the portable IR thermometer and 81 oC / 178 oF with the portable thermal imager.
RECOMMENDATIONPractically, using the information gained from the gold cup probe, modifications to the “setup” of the portable thermal imager and IR thermometer - will increase the accuracy, and ultimately lead to increased tube life and greater product yield.
Reformer Tube Measurements ComparisonGold Cup vs. Portable IR Pyrometer /
Portable Thermal Imager
Gold Cup
Uncorrected Portable IR Pyrometer
Uncorrected Portable Thermal Imager
