Model 607 Low Range Comparator

For measuring unusually low concentrations
in water and chemical analysis
 		 
Uses flat walled tubes of 26 and 40mm "viewing depth" to double and triple test sensitivity of the outfits listed in chart below. These tubes reduce the ranges of all tests (see list on page 9, except pH) to 1/2 or 1/3 normal while maintaining 10 easy-to-distinguish color steps. By using two 26 or 40mm tubes, a normal 0-24 ppm range becomes 0-12 or 0-8 ppm. No. 600-T13, 13mm Square Tube, may also be used for normal ranges.

Test Name
 		 Outfit Range Method

Ammonia
315-DA
0-1.2
Nessler

Chlorine, Very Low Range
435-D
0-500ppb
DPD


Ordering Information
607-A40 Hellige Standard Comparator, with two No. 607-T40 drawn Tubes of 40mm. viewing depth, but with out color disc*
607-A26 Hellige Standard Comparator, with two No. 607-T26 drawn Tubes of 26mm. viewing depth, but with out color disc*
607-A13 Hellige Standard Comparator, with two No. 607-T13 drawn Tubes of 13mm. viewing depth, but with out color disc*
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