Rockwell Automation 13DJ3 Liquid Level Controls User Manual
Page 7
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Table 5: Typical Control Ranges and Probe Materials (continued)
Measured at normal room temperature
Suitable probe materials
SS = 316 stainless steel (standard)
M = Monel
HB = Hastelloy B2
HC = Hastelloy C
Table 6: Level and Resistance Sensing Ranges
Note: All range resistors are 1/2 W ±
10% except Range 1, which is 2 W.
Typical Liquid
Concentration
(% by weight)
Resistivity Range
(ohms cm)
Control Range
Suitable Probe
Material
Potassium Sulfide
5--50
2--10
1
SS
Propionic Acid
5--30
900--1,200
2
M
Refrigerants
2MΩ--20MΩ
5 or 6
SS
Silver Nitrate
10--60
5--20
1
SS
Sodium Acetate
20--30
15--18
1
SS
Sodium Carbonate
5--15
10--20
1
SS
Sodium Chloride
5--25
5--15
1
SS
Sodium Hydroxide
20--50
5--20
1
M
Sodium Iodide
10--40
5--20
1
SS
Sodium Nitrate
10--30
7--12
1
SS
Sodium Sulfate
10--15
8--12
1
SS
Sodium Sulfide
2--18
5--20
1
SS
Strontium Chloride
10--20
5--12
1
SS
Strontium Nitrate
10--40
10--15
1
SS
Sulfuric Acid
5--50
1--10
1
HC
Synthetic Latex
2MΩ--20MΩ
6
SS
Tapwater
2,000--20,000
3
SS
Zinc Chloride
10--40
10--15
1
M
Zinc Sulfate
5--30
20--100
1
SS
Range
Liquid Resistivity
ohms/cm
Resistance
Sensing
Range
Resistor
Maximum
Volts
Maximum
Current
Typical
Solutions
1
0 -- 600
0 -- 150Ω
Orange
Orange
Brown
330Ω
22.5 V AC
65 mA
Acids Bases Salts
2
600 -- 6,000
150 -- 1,500Ω
Red
Violet
Red
2,700Ω
22.5 V AC
8.33 mA
Beer Milk Water
3
6,000 -- 60,000
1,500 -- 15,000Ω
Red
Violet
Orange
27,000Ω
22.5 V AC
0.83 mA
Water Alcohols Distilled
Water
4
60,000 -- 0.6MΩ
15,000 -- 150,000Ω
Red
Violet
Yellow
270,000Ω
29 V DC
0.1 mA
Alcohols Ammonia Distilled
Water
5
.6MΩ -- 6MΩ
150,000 -- 1.5MΩ
Red
Violet
Green
2.7MΩ
29 V DC
0.01 mA
Antibiotics
Refrigerants
6
6MΩ -- 60MΩ
1.5 -- 15MΩ
Red
Violet
Blue
27MΩ
29 V DC
0.001 mA
Refrigerants
Synthetic Latex