BAIRD &TATLOCK (LONDON) LTD. 



5603' Fery Radiation Pyrometer, complete with National 



Portable outfit consisting of Fery telescope wooden tripod, 4 

 steel sheathing, portable millivoltmeter calibrated 600 to 1400 



., and 





The above Pyrometers are specially suited for temperature measurements in connection with 

 the heat treatment of iron and steel. 



The Fery Radiation Pyrometer is also suitable for use in conjunction with the Recorder No. 3, 

 which is substituted in place of the millivoltmeter. 



5604' Recording Fery Pyrometer Outfit, as used in connection with malleable iron or 

 case-hardening furnaces. 



Fery Radiation Pyrometer, telescope only, No. 5603 

 Protecting Cover for above, fitted with lock and key, and including two clamps and 



horizontal supporting bar . . 

 Single Thread Recorder with drum rotating once in 25 hours. Range across chart 



o 1050 C. 100 charts included. No. 5504 

 Thirty yards of 2 -way spirally armoured leads for connecting from telescope to recorder, 



at 8d. per yard plus 4/- for fitting tangs at both ends . . 



Blind Fireclay Tube 4^ in. internal diameter and 4 ft. long. For building into the 

 furnace wall 



Outfit complete 

 5605 1 Outfit as above but with millivoltmeter, wall type instead of recorder . . 



26 5 



12 12 



300 



29 



140 



16 

 46 12 

 27 10 



Fig. A. Front view of the Fery Spiral 

 Pyrometer showing scale and pointer. 



5606 



Fig. B. The Fery Spiral Pyrometer 

 on its tripod. 



5606 T Fery Spiral Pyrometer, complete with National Physical Laboratory Certificate. 



Tripod and travelling case included. Range 600 to 1400 C. . . . . . . 18 



The Fery Spiral Pyrometer is a simple and more compact instrument, though less accurate than the radiation 

 type. The method of receiving and focussing the radiant heat is, however, the same. The difference consists 

 in the sensitive element, as instead of using a thermo-couple which must be connected to a millivoltmeter, a small 

 trimetallic spiral is used, and this controls the movement of a pointer, which move across a dial calibrated in 

 temperature degrees. The instrument is thus entirely self-contained. 



This pyrometer is most suited for taking the temperature of gas retorts, pottery kilns, glass furnaces, etc., 

 where the highest accuracy is not required. 



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CROSS STREET HATTOTST GARDETST, E-C 



1006 





