EQUIPMENT Electronic G a g e Measures Liquid Depth For measuring liquid depth, Gilbert & Barker Mfg. has designed a gage that is actuated by electronic signals operating a servo motor. T h e motor, responding to the signals, raises and lowers a sensing element as liquid level rises or falls in the tank. The tip of a metal probe in the sensing element is the only part of the gage which touches the liquid, according to Gilbert & Barker Mfg. Company recommends gage for refineries, terminals, and tank farms, and says unit can measure any petroleum product at temperatures up to 175° F. in addition to m a n y other liquids. Accuracy of gage is to =t 1 / 1 6 in.
ceiver amplifier in the control box. A diode in the sensing elements makes possible this dual use of the cable. Movement of liquid away from the antenna strengthens the return signal. Raising of liquid on the antenna weakens the signal. Variation in the return signal, amplified in the receiver to operate the servo motor, is the con trolling medium. T h e servo motor ( two-phase standard 3450 r.p.m. with gear reduction of approximately 3500 to 1) is connected to t h e amplifier, the other to the fixed line voltage. Since the amplifier volt age is a variable, the higher or lower voltage opposing the fixed voltage causes t h e servo motor to operate in either a clockwise or counter clockwise direction. This turns a sprocket on the motor which moves t h e perforated tape. Company says, if remote transmis sion is desired, potentiometers and gear ing are mounted inside the motor box for connection to remote reading instru ments. Ε1 • Direct-reading
torque
meter,
by
Waters Mfg., is for measurement of starting and moving torque for servo mechanisms, potentiometers, variable condensers, and rotating machinery having torque loads of 0.01 to 20 in.oz, Unit weighs 7 oz. and two ;»i\;-Jels are available: model 6 0 0 0 - 1 registers 0.010 to 1.2 in.-oz., and model 6000-2 which measures 1.0 to 20 in.-oz. Accuracy is ±5%. Ε2
Tank gage installed at the new Paulsboro, N. J., terminal of Esso Standard Oil The sensing element of t h e unit is a hollow metal cylinder with a straight wire antenna projection. T h e antenna, penetrates the liquid 1 / 1 6 in. T h e elec tronic control is a four-tube electronic circuit of standard radio parts con nected to the sensing element by a. shielded radio frequency cable. A servo motor box raises or lowers the sensing element by means of a perforated stain less tape running between the sensing element and a sprocket on the servo motor. In operation, minute radio frequencysignals are carried to the antenna by the cable between the sensing element and the electronic control box. A. small one-tube transmitter (oscillator) in the control box generates the signals. Simultaneously, return signals are car ried u p the cable to a three-tube re 4022
• Filter line (M Series Condensifilters) of Hankison Corp. has been augmented by addition of two new models. T h e models, M-30 and M-100, are rated at 30 and 100 s.c.f.m. respectively at line pressure of 100 p.s.i.g. Both models feature a condenser to reduce com pressed air dew points, plus a dispos able filter cartridge for removing solid particles. Operating pressures are up to 200 p.s.i.g. All sealing is with Ο rings. Ε3
300 times a minute. Motion is started by setting a synchronous motor-driven timer and automatically stopped w h e n the timer reaches the set number of minutes within its range of 0 to 60 minutes. Ε5 • C h r o m a t o g r a p h i c a n d ion e x c h a n g e columns, b y Fischer & Porter, permit variable column lengths with a single unit. Removable filter disks permit se lection of various filter porosities. Glass to glass coupling can be quickly dis assembled for cleaning. Coupling and removable filter disk allows easy ex tension of t h e adsorbent. By use of a second coupling and filter disk at t h e top, the column may b e r u n in continu ous back flow operation. Stock sizes in 1 / 4 - , 3/s~> V2"> a n d 1-in. heavywalled t u b i n g are available with por celain filter disks. Ε6 • Survey m e t e r , model 2612, by Nu clear Instrument & Chemical, is pro vided with choice of probes utilizing a thin wall Geiger tube for both beta and g a m m a radiation of over 0.2 m.e.v. or a thin mica e n d window counter for alphas, betas, a n d gammas. A single control k n o b turns the instrument on and selects one of tbree ranges—0.2, 2, or 20 milliroentgens/hr. full scale. A calibrated radiation source is included. Ε 7
Electro-Vapor Reaction Vessel For Oils, Synthetic Resins Electro-vapor reaction vessels, by BlawKnox, have an improved design plus a reduction in price. Heat source is built into vessel's jacket and utilizes electric immersion heaters. Dowtherm or water covers the heaters, is vaporized, and con denses upon inner shell of vessel. Proc essing range: 100° to 700° F. E 8
• Process timer, b y General Electric, features a one-knob control. Desig nated the TSA-21, the timer will con trol the timed simultaneous closing of one electric circuit and opening of an other. Ε4 • Test sieve v i b r a t o r , by Arthur S. LaPine & Co., speedily passes particles through screens and segregates the dif ferent sizes in the proper sieves. Move ment of the table is not rotary but like an inclined disk rolling around its per imeter. As the table gyrates, it simul taneously vibrates a fraction of an inch CHEMICAL
For f u r t h e r information on any item mentioned here, see cou pon on page 4024 AND
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