Document zbbGb6pjXj13B3xzeG6aEXmd0

Controls and Instruments Illinois Testing Laboratories, Inc. Room 516, 420 N. La Salle St., Chicago 10, 111. QJ&ruyi' Precision Instruments for Every Industry The direct-reading ALNOR VELOMETER TYPE 4-P Standard minimum net for heating and air conditioning air veioeity measurements. The Alnor Velometer is an instan taneous, direct-reading air velocity meter designed for convenient, rapid determination of air velocities in air conditioning, heating and ventilating, and exhaust systems. It gives instan taneous direct readings in feet per min ute, without timing, calculations, or reference to tables or charts. Accurate information on performance of equip ment, duct systems, etc., can be ob tained with a few moments inspection with the VELOMETER. It can be effectively used to locate drafts and leaks around windows and doors, or in duct systems. Alnor Velometer, Jr. A miniature, di rect reading Velometer--4 in. high, 3 in. wide, 1-Jin. deep. Weight, 8 oz. Accu rate, strong. Available in single and double scale ranges: 0-2000 to 0-2500 fpm. Bulletin 725 The Alnor Velometer is built in sev eral standard ranges from 20 fpm to 6000 fpm, and up to 3 in. static or total pressure. Special ranges available as low as 10 fpm and up to 25,000 fpm Alnor Thermo-Anemometer. For accu rate measurement of low air velocity. Compact, direct-reading, battery oper ated, self-contained, portable. Scale 6 in. Meter range, 0-600 fpm. Accurate readings as low as 5 fpm. Temporary velocity and 20 in. pressure. Bulletin 913-A. 1256 Controls and Instruments The Mercoid Corporation Mam Office and Factory, 4201 Belmont Avenue, Chicago 41. Illinois New Yobs Office, 205 East 42nd St. Philadelphia Office, 3137 N. Bboad St. automatic controls for heating, air conditioning, refrigeration and various industrial applications Magnetic Type There are three primary operating types of Mercoid Mercury Switches:--1. MAG NETIC TYPE, applied in a stationary position. Circuit is opened or closed with mag netic attraction by .means of a permanent magnet or a small milli-ampere electro magnet. 2. TILTING TYPE, a variety of sizes, electrical capacities and arrange ments available. 3. LIGHT ACTUATED TYPE. These switches are immune to dust, dirt or corrosion. Adaptable for numerous applications where open contacts are not suitable. THE 100% MERCURY SWITCH EQUIPPED CONTROLS PRESSURE CONTROLS Noted for their accuracy and dependable perform ance. The outside double adjustment feature and visible dial eliminate all guesswork when setting the operating range. Various ranges and cir cuits available. LOW VOLTAGE THERMOSTATS TEMPERATURE CONTROLS Available with or with out remote connection for use with liquids or gases such as air, oil, water or distillate va pors. Equipped with a JBourdon tube and out side double adjustments. LEVER ARM AND FLOAT CONTROLS Mercoid Sensatherms operate on a total differential of 1 defFl gree F. Type H is the popular m room thermostat. Type DNH is JJ:i a hand-wound day and night HI thermostat. Type HBH is a two---stage thermostat for control of high-low gas or oil burners. LINE VOLTAGE THERMOSTATS No. 855 thermostats will di rectly handle the full motor load without the use of a relay. Available with "onoff" manual switch for unit heater applications. The lever arm type is used where it is desired to mechanically open and close electric circuits. The float type is used to maintain fluid levels in tanks, or for control of sump pumps, etc. LOW WATER CONTROLS Available as a combina tion pressure and low water control or as a low water control only. May be furnished with quickhook up fittings designed in accordance with the A.S.M.E. code. TRANSFORMER-RELAYS Type V is a reliable low volt age mercury contact relay Hwhich also acts as a trans former inducing low voltage (24 volts) on the pilot cir cuit. Available in various voltages, cycles and circuits. VISAFLAME CONTROL For domestic and indus trial oil burners. Oper ates direct from the light of the flame instead of from the heat in the stack. It may be built into the burner unit. 1257