248 



A. DAIGGER & COMPANY, CHICAGO, U. S. A. 



STANDARD SCALES FOR No. 3707 AND No. 3707(a) 



In ordering, specify range desired and whether Fahrenheit or Centigrade divisions. 



Fahrenheit 

 32 1000 

 32 1500 

 32 2000 

 32 2550 



Degrees Per 

 Division 



10 

 20 

 20 

 25 



or 

 or 

 or 

 or 



Centigrade 

 550 

 800 

 1100 

 1400 



Degrees 

 Per 



Division 



5 

 10 

 10 

 20 



3709 



3709(a) 



3709 



PYROMETERS Portable Electric Pyrometer, Brown. This instrument 

 is supplied in either the low-resistance type, with resistance of 5 

 ohms, for base metal thermo-couples, or high-resistance, approxi- 

 mately 100 ohms, for use particularly with platinum rhodium thermo- 

 couples. The scale is 5 inches long, with mirror for accurate reading. 

 In the high-resistance instrument a device which automatically locks 

 the needle when the lid is closed is furnished to prevent damage in 

 handling or iii shipment. Fifteen feet of Double Conductor Wire 

 supplied with each instrument. 



Portable Pyrometer, low-resistance type, 5-inch scale $ 50.00 



Portable Pyrometer, high-resistance type, 5-inch scale 60.00 



Above prices include standard 36-inch Base Metal Thermo-couple, with low-resist- 

 ance instrument. Platinum Rhodium Thermo-Couples for higher temperatures extra. 

 Any desired Fahrenheit or Centigrade Scale can be supplied. 



3709(a) RADIATION PYROMETER, Brown. For measuring temperatures 

 above 3000 Fahrenheit, the Brown Radiation Pyrometer is one of the 

 most accurate and satisfactory instruments to use. It can be readily 

 focused into any furnace, or at any substance, the temperature of 

 which is to be determined, and the temperature read off on the Indi- 

 cator within a minute. The instrument is furnished complete in 

 leather carrying case with tripod for permanent use where desired. 



Complete - $125.00 



