Instruction Manual
7
Table 5: Typical Control Ranges and Probe Materials
(
c
on
t
i
nu
e
d
)
Measured at normal room tem
pe
r
a
tur
e
Suitable probe materials
SS = 316 stainless steel (standard)
M = Monel
HB = Hastelloy B2
HC = Hastelloy C
Table 6:
Level and Resistance Sensing
Ra
ng
e
s
N
o
t
e
:
All
r
ang
e
r
e
s
i
s
t
o
r
s
a
r
e
1
/
2
W
±
10% except Range
1,
w
h
i
c
h
i
s
2 W.
Typical Liquid
Concentration
(% by
w
e
i
gh
t
)
Resistivity Range
(ohms
c
m
)
Control Range
Suitable Probe
Material
Potassium
Su
lfi
de 5
--
50 2
--
10
1SS
Propionic
Acid 5
--
30 900
--
1
,2
00
2M
Re
fri
ge
r
an
t
s2
M
Ω
--
20
M
Ω
5 or 6 SS
Silver
N
itr
a
t
e10
--
60 5
--
20
1SS
Sodium
Ace
t
a
t
e20
--
30 15
--
18
1SS
Sodium
Ca
r
bona
te
5
--
15 10
--
20
1SS
Sodium
Ch
l
o
ri
de 5
--
25 5
--
15
1SS
Sodium
Hyd
r
ox
i
de 20
--
50 5
--
20
1M
Sodium Io
d
i
de 10
--
40 5
--
20
1SS
Sodium
N
itr
a
t
e10
--
30 7
--
12
1SS
Sodium
Su
lfate
10
--
15 8
--
12
1SS
Sodium
Su
lfi
de 2
--
18 5
--
20
1SS
Strontium
Ch
l
o
ri
de 10
--
20 5
--
12
1SS
Strontium
N
itr
a
t
e10
--
40 10
--
15
1SS
Sulfuric
Ac
i
d5
--
50 1
--
10
1HC
Synthetic
La
te
x2
M
Ω
--
20
M
Ω
6SS
Ta p wa
t
e
r
2
,
000
--
20
,
000
3SS
Zinc
Ch
l
o
ri
de 10
--
40 10
--
15
1M
Zinc
Su
lfate
5
--
30 20
--
100
1SS
Range
Liquid Resistivity
oh
m
s
/cm
Resistance
Sensing
Range
Resistor
Maximum
Volts
Maximum
Current
Typical
Solutions
1
0 --
600
0 --
150
Ω
Or
ange
Or
ange
B
r
own
330
Ω
22.5
V AC
65 m
AAc
i
ds Bases Sa
lt
s
2
600 --
6
,0
00
150 --
1
,5
00
Ω
Red
V
i
o
l
e
t
Red
2
,7
00
Ω
22.5
V AC
8.33 m
ABee
r Mil
k
Wa te r
3
6,000 --
60
,0
00
1,500 --
15
,0
00
Ω
Red
V
i
o
l
e
t
Or
ange
27
,0
00
Ω
22.5
V AC
0.83 m
A
W
a
t
e
r
A
l
coho
l
s
Distilled
Wa te r
4
60,000 --
0.6M
Ω
15,000 --
150
,0
00
Ω
Red
V
i
o
l
e
t
Ye
ll
ow
270
,0
00
Ω
29
V DC
0.1 mA
A
l
coho
l
s A
mm
on
i
a
Distilled
Wa te r
5
.6MΩ --
6
M
Ω
150,000 --
1
.5M
Ω
Red
V
i
o
l
e
t
Gr
een
2
.7M
Ω
29
V DC
0.01 m
A
An
ti
b
i
o
ti
cs
Re
fri
ge
r
an
t
s
6
6MΩ --
60
M
Ω
1.5 --
15
M
Ω
Red
V
i
o
l
e
t
B
l
ue
27
M
Ω
29
V DC
0.001 m
A
Re
fri
ge
r
an
ts
Synthetic
La
te
x