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I N D U S T R I A L AND E N G I N E E R I N G
CHEMISTRY
Vol. 41, No. 5
... with Taylor's new force-balance temperature transmitter is faster, needs little maintenance, has a tiny bulb and short, shiftable range spans ERE is a new kind of instrument t h a t pneumatically transmits temperature as far as 1000 feet—with an extremely high degree of accuracy! Thermal element gives 6 3 % response in less t h a n 2 seconds (agitated water).
H
C O M P A R E TRANS AIRE'S 1. Faster Unprecedented speed of response. H W
2 . Tiny, "cigarette size" bulb is more adaptable to confined space, contributes to fast speed of response. 3 . Short, shiftable r a n g e spans:
(a) Standard range span of 50° available where you need exceptionally close readings. Other operating range spans: 100°, 200 and 400°F.; or 25°, 50°, 100° and 200°C. Overall temperature limits from minus 375° to plus 1000 °F. or minus 200 °C to plus 500 °C. (b) You can shift 50° span with screwdriver from 0 to 50° to 50° to 100°, or 100° to 150°, or any intermediate 50°F. interval. Other spans similarly adjusted. (c) Range limits interchangeable by substitution of new spring assembly, giving much greater flexibility. 4 . Little or no maintenance n e e d e d . Force-balance principle practically eliminates wear. Instrument may be quickly adapted to different operating conditions by interchangeable thermal system, spring assemblies and manifold. Permits low inventory of components.
In a d d i t i o n . S p e e d - A c t , — an entirely new technique in temperature measurement — may be a d d e d to compensate for unusual thermal lags such as occur in applications requiring separable wells.
9
OUTSTANDING
FEATURES:
5 . Eliminates all electrical hazards in explosive atmospheres. 6. Positive-acting Pilot Valve—Taylor FULSCOPE Relay Air Valve assures quick changes in transmission pressure, overcomes effect of minor leaks. 7 . Fixed and Linear Output Range—3 to 15 psi output for full temperature span is linear to 0.012 psi. Fixed output pressure span eliminates need for individual calibration of receivers or receiver-controllers. 8 . Fully Compensated for barometric and ambient temperature changes. 9 . Great Over-range Protection — withstands temperatures of 1000°F, regardless of range. TRANSAIRE* with SPEED-ACT is one more step in Taylor's coordinated program for developing better industrial instrumentation. It grew from intensive research and design effort which had just one purpose: to produce a temperature transmitter unsurpassed in accuracy and durability. Ask your Taylor Field Engineer! Or write for B u l l e t i n 98140. Taylor Instrument Companies, Rochester, N. Y., or Toronto, Canada. • • • Instruments for indicating, recording and controlling temperature, pressure, humidity, flow and liquid level.
INDUSTRIAL
May 1949
AND ENGINEERING
73 A
CHEMISTRY
Speed-Act 1 LEFT: Open side view of T R A N S A I R E * T e m p e r a lure T r a n s m i t t e r . BELOW: T R A N S A I R E * T e m p e r a t u r e T r a n s m i t t e r in operation on a gasoline fractionating column.
QUICK
PICTURE
OF FORCE
BALANCE
T R A N S A I R E * consists of four main assemblies: 1. A unique gas thermal system which provides force necessary t o a c t u a t e transmitter. 2 . A simple lever which transmits t h e force of t h e thermal system t o operate the baffle—no pivots used! 3 . A. spring and compensating bellows assembly which balances t h e initial pressure in thermal system and compensates for barometric a n d t e m p e r a t u r e changes. 4 . A balancing p n e u m a t i c circuit consisting of a bellows, baffle, nozzle a n d relay valve. These convert force developed by lever to precisely proportion o u t p u t air pressure according to measured t e m p e r a t u r e .
"laiflcr Irwbrunienb MEAN
ACCURACY FIRST IN
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