Document nNvomKDK17O3OND9y7GDvYkJz

Controls and Instruments Illinois Testing Laboratories, Inc. 422 N. LaSalle Street, Chicago, Illinois TESTING ENGINEERS AND MANUFACTURERS Pyrometers--Portable--Wall Type--Surface Temperatures Distant Reading Resistance Thermometers Automatic Temperature Controllers--Air Velocity Meters "ALNOR" VELOMETER The Only All-Purpose Air Velocity Meter The Velometer is a versatile direct reading air velocity meter which gives instantaneous readings of the speed of air. The Velometer can be scaled to not only read velocities directly, but also to read static or total pressures when using suitable jets. The Velometer is ideal for measuring duct Velocities and pressures, velocities at grilles or registers. It also offers a convenient and satisfactory instrument for checking drafts, leaks around doors _ or windows or in ducts, velocities of ceiling outlets and Velometer with averaging jet similar air diffusers. used for checking velocity from Anyone can use supply grille. to leftside. Tube is altabhed t.h, e Ve-,lomet,er. No mathematical cal culations, no leveling--no timing. Made in standard ranges for velocity readings from 20 fpm to 6000 fpm and 3 in. static or total pressure. Special ranges available as low as J .JL . ... .. . 10 fpm and up to 24,000 fpm velocity and 20 in. right sid^ pressure. New Intake or Exhaust Grille Jet--To provide more accurate velocity readings at exhaust grilles a new type jet is now offered for use with the Velometer. This jet compensates for the change from static pressure to velocity pressure at or near the face of the grille. Spot jets--for velocities over very small areas. Averaging jets--for obtaining average velocities over a definite area or grille face. Duct jets--for determining velocities directly within ducts or pipes. Static pressure jet--for static pressures in inches of water. Total pressure jet--for total pressure in inches of water. Other jets--Standard jets offered in several lengths and sizes. Special jets--can be designed for unusual appli cations. Ask for Bulletin No. 2448-D View shows how instrument is used to read low velocities without jets. "ALNOR" DISTANT READING ELECTRIC THERMOMETERS The use of "Alnor" multi-point resistance type thermometers is rapidly increasing in air-conditioning, as well as for heating and refrigerator installations. The instrument can be located in the machinery room or boiler room with the elements located on various floors in any part of the building, or outdoors, thus providing the engineers with constant and convenient temperature readings. "Alnor" thermometers are made in several styles and sizes, both portable and mounted types. Ask for Bulletin No. 2451-B 1000 "Alnor" round type multi-point resist ance thermometer with built-in switch. Controls and Instruments Leeds & Northrup Company General office and works: 4941 Stenton Avenue, Philadelphia, Pa. Branch Offices: Boston Buffalo Chicago Cincinnati Cleveland Detroit Hartford Houston Los Angeles New York Pittsburgh St. Louis San Francisco Tulsa RUGGED, ELECTRICAL-BALANCE INSTRUMENTS Model S Micromax Recorder Records from 1 to 19 poinie on a einole stripchart. Extremely open record. Can operate eignale. (About 1/16th size) Model R Micromax Recorder Records 1 or g points on a round-chart. Bat extremely readable dial Can operate ngnale. (About 1/lBth size) Band-operated. Can be connected through selector ewitchee to any number of points. (About 1/lgih sice) Electrical Thermometers for Air Conditioning Electrical Instruments for the Steam Plant No method for measuring temperatures fits the specific needs of air conditioning as does the three-lead, null-type resistance thermometer method. It is independent of distance and disregards all temperatures except those right at points of measure ment. Thermohms (electrical resistance thermometers) can be placed anywhere-- in rooms, air ducts or water lines. They are connected by simple electrical wiring to instruments at a central location. Instruments maybe: Micromax Recorders, Model S for up to sixteen Thermohms, Model R, for related pairs such as wet and dry bulb; indicators with switches for any number of Thermohms; or indicating and recording combinations. Sound in principle, this equipment is reliable in operation. Instruments and The facts needed to operate a modem heating plant so as to save fuel, to protect equipment, and to operate efficiently at varying loads are provided reliably by rugged I.&N instruments. Readings can be indicated or recorded or both. Re corders can be equipped to operate signals or alarms that warn the operator of extreme conditions. In some cases the instruments control automatically. Micromax Model S provides a per manent record of conditions at from 1 to 16 points on one wide-scale chart. Micro max Model R concentrates on conditions at one point, provides a permanent record, has a giant indicating dial that can be read at a glance. A Panel Indicator pro vides intermittent checks on conditions at one or several points. Thermohms are highly responsive, yet rugged in construction. A complete system In the heating plant, L&N measuring, is easy and economical to install, regardless signalling or controlling equipment is of distances. It is easy to operate and demands minimum maintenance. Therm ohms and instruments are interchangeable, and can be replaced without disturbing wiring or returning anything to the factory. used for; Metermax Combustion Control Furnace Pressure Control Smoke Density Analysis L&N Resistance Thermometers make it possible to operate efficiently; to maintain comfort or correct process atmosphere con stantly ... so that maximum return is realized on the conditioning investment. Jrl Ad-N-225(2) Flue Gas Analysis (Per Cent CO,) Flue Gas Temperatures Steam and Water Temperatures Boiler-Furnace Temperatures Condenser Leakage 1001