COLEMAJV
C o l e m a n p H Instrumentation Three pH meters and complete selection electrodes meet full range of laboratory measurement requirements
of pH
L o w - c o s t M e t r i o n pH M e t e r is a line-operated instrument featuring a basic simplicity of design and operation which make it ideal for general-purpose laboratory use. With measurement accuracy to 0.05 pH, the Metrion provides a level of performance far out of proportion to its moderate cost. Features: • Stabilized against line voltage fluctuations over 95-125 volt range. • Easy-to-read duplex scales cover 0-14 pH range. • Calibration control provides compensation for temperature effect. • Simplified operation—"push-to-read" pH control. Cost—only $139.00. I n c r e a s e d v e r s a t i l i t y , M e t r i o n T£ pH M e t e r offers the same simplicity of design and operation as the basic Metrion. It also features two additional circuits for increasing versatility of the instrument: . . .a true temperature-compensating circuit with a control knob conveniently located on instrument's front panel. . . . an output jack for use with an automatic titrator such as the Coleman Titrion. Addition of these two circuits makes the Metrion II valuable for an increased variety of specialized laboratory applications with only a small price increase. Cost—$160.00. F u l l y - v e r s a t i l e C o m p a n i o n pH M e t e r is a zero-restoring instrument ideal for a broad range of laboratory applications. It provides pH measurement over the 0-14 p H range with a routine accuracy of 0.05 pH and reproducibility within 0.02 pH. The instrument also may be used for millivolt measurements over a 1400 mv span. Features: • Zero-restoring circuit for drift-free operation. • May be used with recorder, automatic titrator, and automatic temperature compensator accessory. • Simplified control system for easy operation. • Manual Temperature Compensator control permits accurate measurement over 0-100° C. range. Cost—$300.00 C o m p l e t e s e l e c t i o n of electrodes—Coleman electrodes cover virtually every practical application of laboratory p H measurement. They are usable with any Coleman p H meter or other instrument of modern manufacture. • Glass electrodes, shielded against stray electrical fields, permit precise measurement over widely-varying conditions of temperature, viscosity, alkalinity. • Reference electrodes are available in standard calomel or non-mercurous types. • Metallic electrodes for electometric titrations. • Special-purpose electrodes for unusual applications. Coleman electrodes are priced about one-third less than the closest competitive designs.
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details COLEMAN INSTRUMENTS, INC., MAYWOOD, ILLINOIS Circle No. 210 on Readers' Service Card
VOL. 35, NO. 3, MARCH 1963
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