Level indicators PMP-111
Application
Designed for indication of relative filling of tank using LED scale integrated in sensor housing. Installed at side wall of container tanks for LPG transportation. Indicates filling within range from 80 to 90% of full volume. Can be applied for monitoring of tank overfilling.
Design, principle of operation
Float with magnet travels along the guide pipe and closes reeds which are connected using resistive voltage divider circuit. The controller lights up 6 LED scale, indication of 11 levels is reached by silmultaneous glowing of two near LEDs. For better viewing, LEDs are placed as in traffic lights. The sensors are powered by lithium battery which is placed within housing under removable threaded cover. LEDs are glowing in pulsed mode; it is used for prolongation of life battery; at least 3 years of continious operation, after that the battery can be replaced.
Технические параметры
|
№ |
Parameter |
Value of converter’s parameter |
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|
PMP-111 |
PMP-116 |
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|
1
|
Guide pipe length, mm: |
Main variant |
- |
6000 |
|
Transport variant: |
- |
2000 |
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|
2 |
Number of monitored levels |
11 |
11 |
|
|
3 |
Triggering inaccuracy, % |
± 0.5 of full volume |
- |
|
|
4 |
Inaccuracy of control level setting, mm |
- |
±2 |
|
|
5 |
Nominal power supply voltage |
3 |
||
|
6 |
Power supply |
lithium battery CR123 |
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|
7 |
Battery replacement period, years |
3 |
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|
8 |
Pressure of controlled medium, MPa, not more than |
2.5 |
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|
9 |
Ambient temperature, оС |
from minus 50 to 60 |
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|
10 |
Temperature of controlled medium, °С |
from minus 50 to 801) |
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|
11 |
Liquid phase density, kg/l |
0.5 …0.6 |
Not less than 0.5 |
|
|
12 |
Water and dust ingress protection degree as per IEC 60529 |
IP66 |
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|
13 |
Explosion protection marking |
Ga/Gb Ex db IIВ ТЗ |
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|
15 |
Approximate weight, kg |
Guide pipe - 1 kg (1 m), flange Dn50 - 3.5 kg, housing - 1.5 kg;/p> |
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|
16 |
Average lifetime, years |
15 |
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1) Upon agreement with the manufacturer, temperature of process media may reach 130 ℃.