BAIRD &TATLOCK (LONDON) LTD. 



Thermo-Electric Pyrometers. 



couple." *In practice they must frequently *yw way to the galvanometer. 

 i&iSS^SS^^ the galvanometer to the thermo- 



^In industrial work the galvanometer is of a robust type ge nerall> -ailed I the " indicator " or - recorder/- 

 the scale of which is arranged to read or record directly in degrees of temper. Micator 

 A thermo-electric pyrometer outfit therefore usually ^$^%g^i?$g$Sg& 

 or recorder, (2) the thermo-couple, (3) the connecting ^-^^^^/^ below detailed information about 

 relation to the particular use for which the pyrometer is euired ana 

 our instruments under these three headings. 



5502 



5503 



5502* Portable Thermo-Electric Pyrometer. This type is supplied with scale graduated 

 for three different temperatures. 



(!) o 1000 C. for use with platinum and platinum iridium couple. 



( 2 ) o 1400 C. platinum and platinum rhodium couple. 



(3) o 500 C. copper constantin couple. 



In this instrument the moving coil is pivoted and thus the instrument is robust and requires no skill to use 

 and does not require careful levelling. The Indicator has a high internal resistance, and therefore the length 

 of the leads used has within wide limits no effect on the reading. The scales are unusually clear and are divided 

 in 10 degrees throughout their entire length. A mirror is fitted behind the pointer to enable the observer to 

 avoid errors due to parallox (either range can be supplied). 



Price, without couple or couple wire 



5503 T Wall Type Thermo-Electric Pyrometer or millivoltmeter, made exactly similar to the 

 above, but recommended for permanent installations. Price, without couple or couple 

 wire 



If either of the above instruments are fitted with double scales so that they can be used with either a platinum, 

 platinum-rhodium or iridium couple and the Fery radiation pyrometer, the extra charge will be JEa. 



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CROSS STREET HATTCHSr GARDE1ST, E- 



994 



