AI helper
Describe the task — I'll match 3 WIKA models in 30 seconds
N-ALM 1
N-ALM
On order
WIKA · Level measurement · Family N-ALM

Level sensor with reed measuring chain

Accident-proof level sensor with reed-chain technology for nuclear power plants, based on float principle with magnetic transmission.
Range
0…20 m
Output
resistance (3-wire potentiome…
Protection
IP68
KTA 3505IEC/IEEE 60780-323:2016RCC-E edition 2019
Price
On request
Depends on configuration
Request a quote
+38 (067) 285-77-70·info@avigan.com.uaViberTelegram

Description

The model N-ALM level sensor is used to measure and transmit the level of liquids in conjunction with a customer's control unit outside of the containment area. It is based on the float principle with magnetic transmission in a 3-wire potentiometer circuit. The resistance measuring chain is closely stepped. Due to this assembly the generated voltage is approximately continuous. Signal transmission over large distances and use in hazardous areas are possible.

This instrument was designed without any organic materials or active electronic components in the sensors or cabling that could be affected by the accident conditions described. The sensor will continue to function even in case of a Loss of Coolant Accident (LOCA) and can be fitted with a filter for protection against coarse debris. An accident-proof connection using mineral-insulated metal-sheathed cable is also available and meets the same standards as the integrated sensor units.

Accident-proof level sensor with reed-chain technology, model N-ALM

This instrument is ideal for retrofitting the existing level measuring instrument as part of a wide range of post-accident monitoring systems.

The purpose of accident level measurement is to ensure functionality during and after a severe accident scenario. All materials used are inorganic and capable of withstanding a high dose of gamma radiation.

Special features

  • Process- and system-specific solutions possible
  • Functional under LOCA conditions
  • High resistance to temperature, pressure, radiation and humidity
  • Seismic qualification up to 2.5g (up to 5g on request)
Identification
ModelN-ALM
Subcategoryfloat
Measuring range
Level ranges0…20 m
Process conditions
Process temperature−10…+250 °C
Max process pressure10.5 bar
Measurement technologyfloat
Electrical characteristics
Output signalresistance (3-wire potentiometer circuit)
Electrical connectionmineral-insulated metal-sheathed cable
Materials
Wetted parts materialstainless steel
Operating environment
Ambient temperature−10…+70 °C
IP ratingIP68
Certifications and approvals
Certifications
KTA 3505IEC/IEEE 60780-323:2016RCC-E edition 2019
Additional details
Datasheet languagesEN, DE
Tables from datasheet
Normal operating conditions
Operating temperatureT = -10 °C ... +70 °C [14 ... 158 °F]
Operating pressureAmbient
LengthsUp to 20 m [65 ft]
Humidity100 %
Operational radiation dose≤ 160 kGy [16 MRad]
Accident conditions
Accident temperature250 °C [482 °F]
Accident pressure10.5 bar [1.05 MPa]
Accident mission time1 year
Accident radiation doseIntegrated 5.05 MGy [505 MRad]
Seismic accelerationUp to 2.5g (higher accelerations up to 5g on demand)
Overview of versions
Model 1)Reed Switch Unit (RSU)Magnetic Float Unit (MFU)Stainless steel materialFloat Guide Tube Unit (FGTU)Filter boxPt100 tem- perature sensorRedundant measuring equipmentModular design
ALM-D1xxxxx---
ALM-D2xxx-----
ALM-D3xxx----x
ALM-D4xxxxxx--
ALM-D5xxxxx-x-
ALM-D6xxxx-x-x
BLR-ALMxxxxx---
BLR-NKxxxxx---
Qualification
ALM-D1IEC/IEEE 60780-323:2016, KTA 3505
ALM-D2
ALM-D3
ALM-D4
ALM-D5
ALM-D6
BLR-ALMRCC-E edition 2019
BLR-NKIEC/IEEE 60780-323:2016