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7ΑΟΜ04. HIGH TEMPERATURE
COMBUSTION FURNACE • A new furnace for general use in micro and semimicro combustions at temperatures up to 1150°C (2100°F) • Dual thermocouples for determination of both element and tube temperatures • Long-life heating element of new design, and Pyroceram end plates
For milligram and centigram procedures. Designed specifically t o provide a temperature of 1150°C (2100°F) as required for t h e direct determination of oxygen by the Unterzaucher procedure, b u t suitable for all microchemical combustion techniques requiring elevated temperatures. Accommodates combustion tubes u p t o 18 m m outside meter. A built-in Platinum-Platinum 1 3 % Rhodium thermocouple is supplied with t h e Furnace. An external removable thermocouple of identical characteristics is offered for direct determination of temperatures existing within the combustion tube. A switch permits reading of temperatures of either thermocouple on the pyrometer. ^J The replaceable heating element is of new design,
tor switch for the two thermocouples, mounted pyrometer, pilot light and adjustment knob for the built-in variable input transformer, Housing· is of sheet metal finished in two tone * T r t h v e n t i l a t e d t o n o f anodized aluminum ^ t w o \ i r c u l a r e î d pVtes a?e of l o n g S n g p y r o C e r a m and are held in position by two aluminum rings. Overall dimensions of the Furnace, 1334 X 1234 X 8Vs inches; height t o combustion tube 9 inches. Use of the 1 KW constant voltage transformer is recommended to protect the heating element and to provide a temperature at center of heating chamber constant within 5°C olts irrespective of line fluctuations in t h e r n e 9 t o 130 , ^ § .° , ,Y - Without transformer, a change ot 5% m input voltage results in changes up to lo C at H50°C.
providing a heating c h a m b e r approximately 280
5675-B.
mm long X 19 mm inside diameter, with a groove
as above described, with built-in Platinum-Platinum 13% Rhodium
On b o t t o m t o a c c o m m o d a t e t h e i n t e r n a l t h e r m o COUple. Special K a n t h a l r e s i s t a n c e w i r e is WOUnd
in coils, arranged t o provide a zone approximately 100 m m long with uniform temperature when operating a t 1150°C. A l t h o u g h t h e construction
Furnace, High Temperature Combustion, Thomas,
Thermocouple for determining temperature at the element, but without External Thermocouple or Constant Voltage Transformer.
Power
consumption 650 watts. For use on 115 volts, 50 or 60 cycles, a.c 425.00
5675-C.3 0 Ditto, but with 1 KW Constant Voltage Transformer. volts 6 0 c cle a c on,
insures a long element life, it can be conveniently
For 9 5
r e p l a c e d in t h e e v e n t of a b u r n o u t .
5675-D.
"'
-
v *· - ·
y
External Thermocouple f o r determining
Control panel contains on-off power switch, selecMore detailed QUALITY AND SERVICE
A.H.T.CO. LABORATORY
APPARATUS
information
596.00
Ditto, but with 1 KW Constant Voltage Transformer and temperatures within the
tube. For 95-130 volts, 60 cycles, a.c only sent upon
636.00
request
ARTHUR H. THOMAS COMPANY More and more laboratories rely on Thomas/ tas f
Laboratory
Apparatus
and
Reagents
/ VII VINE ST. AT 3 R D · PHILADELPHIA S, PA. Circle No. 117 on Readers' Service Card 98 A
·
ANALYTICAL CHEMISTRY
