For accurate measurement of ...the RADIOMETER ρ Η Mete r* Among the complete line of famous Danish RADIOMETER Electro-chemical instruments is the pHM 22. This model is a-c line operated a n d designed for general laboratory use inclusive of electrometric titrations.
Features • • • • • • • • •
Exceptional stability — no zero drift Large mirror scale spreads 14 pH over 1 1 inches Accessory biological meter 6-8 pH on a 6.4" scale Accuracy .01 to .05 pH with reproducibility down .002 pH 10 Millivolt ranges Accurate temperature compensation Will perform measurements on grounded media Will perform Dead Stop End Point titrations Full range of standard and special type electrodes
Applications •
Also available MODEL TTTI comprising all the features of pHM22 but designed for automatic titration and batch control. Ask for descriptive literature.
pH determinations a n d millivolt measurements in the laboratory • Continuous p H determinations or millivolt measurements • Acid/base, redox or other potentiometric titrations • Dead-stop end-point titrations Descriptive literature on request.
SOLD A N D SEKVICCD IN U.S.A. BY
WELWYN INTERNATIONAL INC. 3355
E d g e d iff
Terrace
CLEVELAND In
11, OHIO
C a n a d a :
RADIOMETER
72 Emdrupvei Contact a n y Branch of C a n a d i a n L a b o r a t o r y Supplies
C O P E N H A G E N , DENMARK
Limited
For further information, circle number 37 A on Readers' Service Card page 77 A VOL. 3 0 , N O , 8 , AUGUST 1 9 5 8
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3 7 A
