Water sensor
TMW
The water sensors (TMW) installed on the water pipes are suitable for heating and domestic hot water control. The water sensors come with immersion
sensor of different lenghts as follows (Ø 4 mm):
Type code Meas. element Meas. accuracy
TMW-(50, 100, 210) / NTC10 NTC 10 + 0,2 °C (0-70 °C)
TMW-(50, 100, 210) / Pt1000 Pt 1000 + 1 °C (0-70 °C)
TMW-(50, 100, 210) / Ni1000 Ni 1000 LG + 1 °C (0-70 °C)
Technical information
Materials
- Case Cover PC, base PBT, seal PA
- Immersion pipe and nipple RST AISI 304 EN 1.4301
Range of use -50 °C...+130 °C (water, cooling liquids)
Protection class IP 54
Seal M16 x 1,5
Pressure class PN 16
Time constant < 3 s
Thread R ½”, cross-knurling
Wrench size 22 mm
Dimensions:
Installation and connection
2.
3.
X = 130 mm, 180 mm, 290 mm
Install the water sensor on the bend of the water-supply pipe so that the
immersion sensor faces opposite the direciton of ow.
The sensor should be positioned at a point where the water is well mixed.
With heating control install the supply water sensor approx. 1 m from the
mixing point and with hot water temperature control install the supply water
sensor less than 0,5 m from the mixing point
1. Screw the sensor on a welded pipe tting or T-piece using proper sealing
methods. The case can be turned clockwise at the end of the rst pocket
until the cable’s bushing seal goes down.
2. Open the screw-off lid and connect the sensor to the controlling device as
a two-wire connection using weak current cable. The polarity of the cable
is irrelevant.
OUMAN OY
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3. Tighten the bushing seal so that it acts as a seal and repels water.
Vastusarvotaulukot / Resistanstabell / Resistance table
NTC10
Tol. ± 0,2 °C (0-70 °C)
Temperature/Resistance
°C
-50
-40
-30
-25
-20
-15
-10
-5
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
110
120
130
140
Ω
672 600
337 270
177 210
130 540
97 140
72 990
55 350
42 340
32 660
25 400
19 900
15 710
12 490
10 000
8 055
6 531
5 325
4 368
3 602
2 987
2 488
2 084
1 753
1 482
1 257
1 072
917,4
788,2
679,8
511,0
389,4
300,5
234,7
Ni 1000 LG
Tol. ± 0,4 °C (0 °C)
DIN EN43760
tcr 5000 ppm / K
Temperature/Resistance
°C
-50
-40
-30
-25
-20
-15
-10
-5
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
110
120
130
140
[K]
T
1,5
Tolerance Ni 1000 LG
Ω
790,9
830,8
871,7
892,5
913,5
934,7
956,2
978,0
1000,0
1022,3
1044,8
1067,6
1090,7
1114,0
1137,6
1161,5
1185,7
1210,2
1235,0
1260,1
1285,4
1311,1
1337,1
1363,5
1390,1
1417,1
1444,4
1472,0
1500,0
1557,0
1615,4
1675,2
1736,5
Temperature/Resistance
[K]
T
1,5
Pt 1000
Tol. ± 0,3 °C (0 °C)
DIN EN60751 B
tcr 3850 ppm / K
°C
-50
-40
-30
-25
-20
-15
-10
-5
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
110
120
130
140
Tolerance Pt 1000
Ω
803,1
842,7
882,2
901,9
921,6
941,2
960,9
980,4
1000,0
1019,5
1039,0
1058,5
1077,9
1097,3
1116,7
1136,1
1155,4
1174,7
1194,0
1213,2
1232,4
1251,6
1270,8
1289,9
1309,0
1328,0
1347,1
1366,1
1385,1
1422,9
1460,7
1498,3
1535,8
2 x 0,5 mm² (Cu)
50 m
3,36 Ω 6,72 Ω
OUMAN OY
www.ouman.fi
ouman@ouman.fi
100 m
1,0
0,5
0
-0,5
-1,0
-1,5
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120
[°C]
1,0
0,5
0
-0,5
-1,0
-1,5
t
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120
[°C]
t
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