Hach-Lange SENSION+ pH31 - Manual (Page 18)

Replacement parts and accessories (continued)
Description Item no.
3x50 mL printed beakers for benchtop pH calibration LZW9110.98
Three-sensor holder, for sensION+ benchtop instruments LZW9321.99
Holder and clamp for three sensors LZW9155.99
Pyrex glass chamber, continuous flow measurements LZW9118.99
PP protector, electrode storage LZW9161.99
Standard solutions
Technical buffer solutions (DIN 19267)
Refer to
Table 4 pH and ORP (mV) values of specific buffer sets at
varying temperatures.
Table 4 pH, ORP (mV) and temperature values
Temperature pH mV
°C °F
0 32 2.01 4.01 7.12 9.52 10.30 —
10 50 2.01 4.00 7.06 9.38 10.17 245
20 68 2.00 4.00 7.02 9.26 10.06 228
25 77 2.00 4.01 7.00 9.21 10.01 220
30 86 2.00 4.01 6.99 9.16 9.96 212
40 104 2.00 4.03 6.97 9.06 9.88 195
50 122 2.00 4.06 6.97 8.99 9.82 178
60 140 2.00 4.10 6.98 8.93 9.76 160
70 158 2.01 4.16 7.00 8.88 — —
80 176 2.01 4.22 7.04 8.83 — —
90 194 2.01 4.30 7.09 8.79 — —
18 English