Hach-Lange SENSION+ MM374 User Manual
Page 20
Buffer solutions (DIN 19266)
Refer to
for pH values of specific buffer sets at varying
temperatures.
Table 4 pH and temperature values
Temperature
pH
°C
°F
5
32
1.668
4.004
6.951
7.087
9.395
10.245
13.207
10
50
1.670
4.000
6.923
7.059
9.332
10.179
13.003
20
68
1.675
4.001
6.881
7.016
9.225
10.062
12.627
25
77
1.679
4.006
6.865
7.000
9.180
10.012
12.454
30
86
1.683
4.012
6.853
6.987
9.139
9.966
12.289
40
104
1.694
4.031
6.838
6.970
9.068
9.889
11.984
50
122
1.707
4.057
6.833
6.964
9.011
9.828
11.705
60
140
1.723
4.085
6.836
6.968
8.962
—
11.449
70
158
1.743
4.126
6.845
6.982
8.921
—
—
80
176
1.766
4.164
6.859
7.004
8.885
—
—
90
194
1.792
4.205
6.877
7.034
8.850
—
—
Conductivity standard solutions
Refer to
for conductivity values of standard solutions at varying
temperatures.
Table 5 Conductivity and temperature values
Temperature
Conductivity (EC)
°C
°F
µS/cm
µS/cm
mS/cm
mS/cm
15.0
59
119
1147
10.48
92.5
16.0
60.8
122
1173
10.72
94.4
17.0
62.6
125
1199
10.95
96.3
Table 5 Conductivity and temperature values (continued)
Temperature
Conductivity (EC)
°C
°F
µS/cm
µS/cm
mS/cm
mS/cm
18.0
64.4
127
1225
11.19
98.2
19.0
66.2
130
1251
11.43
100.1
20.0
68
133
1278
11.67
102.1
21.0
69.8
136
1305
11.91
104.0
22.0
71.6
139
1332
12.15
105.4
23.0
73.4
142
1359
12.39
107.9
24.0
75.2
145
1386
12.64
109.8
25.0
77
147
1413
12.88
111.8
26.0
78.8
150
1440
13.13
113.8
27.0
80.6
153
1467
13.37
115.7
28.0
82.4
156
1494
13.62
—
29.0
84.2
159
1522
13.87
—
30.0
86
162
1549
14.12
—
31.0
87.8
165
1581
14.37
—
32.0
89.6
168
1609
14.62
—
33.0
91.4
171
1638
14.88
—
34.0
93.2
174
1667
15.13
—
35.0
95
177
1696
15.39
—
Demal (D) and NaCl 0.05% EC standards
Refer to
for conductivity values according to temperature.
20 English