WIKA · Level measurement · Family BMD
Magnetic display
Magnetic display for bypass level indicators with visual level indication using rollers or flaps, suitable for a wide range of industrial applications including chemical, petrochemical, and food industries.
Range
0.18…6 m
Protection
IP65
RoHSCEEU Declaration of ConformityEx e mb Zone 1Ex mb Zone 21Ex e mb IIC T5...T4 GbEx mb IIIC T95...T130 °C Db IP66II 2G Ex e mb IIIC T5 ...T4 Gb
Price
On request
Depends on configuration
Description
The model BMD magnetic displays are used in combination with bypass level indicators for the display of levels. A magnetic system built into the float transmits the liquid level, contact-free, to the externally mounted display. In this are fitted, at 8 mm intervals, plastic rollers or stainless steel flaps with bar magnets. Through the directional magnetic field of the permanent magnetic system in the bypass float, the magnetic rollers or flaps, through the wall of the bypass chamber, are turned through 180°.
With this functional principle of the magnetic display, the
Fig. left: Plastic rollers, model BMD-SA Fig. right: Stainless steel flaps, model BMD-FR
level of a vessel is indicated as a coloured column, without auxiliary power.
An integrated T-slot serves for the fastening of further attachment parts such as scales, transmitters and switches.
For selecting the optimum magnetic display (plastic rollers/ stainless steel flaps, case, scale, measuring range etc.) we offer application-related technical advice.
Special features
- Measured value display by means of rollers or flaps with permanent magnets
- Medium temperatures from -200 ... +450 °C
- Splash-proof or hermetically sealed
- Without power supply
- Hermetically sealed from the process
Identification
| Model | BMD |
| Subcategory | Magnetic display |
Measuring range
| Level ranges | 0.18…6 m |
Process conditions
| Process temperature | −200…+450 °C |
| Measurement technology | magnetic_display |
Electrical characteristics
| Power supply | DC 24 V (±10 %) |
| Electrical connection | Cable from polyurethane (2 x 1.5 mm²), length 10 m |
Materials
| Wetted parts material | PBT, Aluminium, Stainless steel, Polycarbonate, Glass |
Operating environment
| Ambient temperature | −20…+60 °C |
| IP rating | IP65 |
Certifications and approvals
| Certifications | RoHSCEEU Declaration of Conformity |
| Explosion protection | ATEX II 2G Ex e mb IIC T5...T4 GbEx e mb Zone 1Ex mb Zone 21II 2D Ex mb IIIC T95...T130 °C DbEx e mb IIC T5...T4 GbEx mb IIIC T95...T130 °C Db IP66II 2G Ex e mb IIIC T5 ...T4 GbII 2D Ex mb IIIC T95 ...T130 °C Db IP66 |
Additional details
| Datasheet languages | EN, DE |
Tables from datasheet
| Model | Instru- ment model | Material |
|---|---|---|
| BMD-SA | MRA | Plastic rollers in aluminium case, with T-slot |
| BMD-SR | MRAV | Plastic rollers in stainless steel case, with T-slot |
| BMD-FA | MRF | Stainless steel flaps in aluminium case, with T-slot |
| BMD-FR | MRFV | Stainless steel flaps in stainless steel case, with T-slot |
| BMD-SS | MRAS | Plastic rollers in stainless steel case, hermetically sealed, with T-slot |
| BMD-FS | MRFS | Stainless steel flaps in stainless steel case, hermetically sealed, with T-slot |
| BMI-LE | - | Illumination for magnetic bar (attachment) |
Specifications
| Case | Stainless steel |
|---|---|
| Length L | 180 ... 6,000 mm[7.1 …236.2 in] |
| Indication element | Plastic rollers, PBT, red/white |
| Indicator window | Polycarbonate |
| Ingress protection | IP65 per IEC/EN 60529 |
Specifications
| 16 0,63 Case | Aluminium, anodised |
|---|---|
| Length L | 180 ... 6,000 mm[7.1 …236.2 in] |
| Indication element | Plastic rollers, PBT, red/white |
| Indicator window | Polycarbonate |
| Ingress protection | IP65 per IEC/EN 60529 |
Specifications
| Case | Aluminium, anodised |
|---|---|
| Length L | 180 ... 6,000 mm[7.1 …236.2 in] |
| Indication element | Stainless steel flaps, red/white |
| Indicator window | Glass |
| Ingress protection | IP65 per IEC/EN 60529 |
View all (13)
Specifications
| Case | Stainless steel |
|---|---|
| Length L | 180 ... 6,000 mm[7.1 …236.2 in] |
| Indication element | Plastic rollers, PBT, red/white |
| Indicator window | Polycarbonate profile, argon gas-filled, hermetically sealed |
| Ingress protection | IP66/68 per IEC/EN 60529 |
Specifications
| Case | Stainless steel |
|---|---|
| Length L | 180 ... 6,000 mm[7.1 …236.2 in] |
| Indication element | Stainless steel flaps, red/white |
| Indicator window | Polycarbonate profile, argon gas-filled, hermetically sealed |
| Ingress protection | IP66/68 per IEC/EN 60529 |
Specifications
| Electrical connection | Cable from polyurethane (2 x 1.5 mm² [0.08 x 0.06 in²] [H07BQ-F]), length 10m [393.7 in] |
|---|---|
| Length | 100 ... 1,242 mm[3.9 …48.9 in] Illumination length > 1,242 mm[48.9 in]: several illumination units required |
| Ambient temperature | -20 …+60 °C [-4 …+140 °F] |
| Auxiliary power | DC 24V (±10 %) |
| Electrical power | approx.30W/m |
| Service life | approx. 50,000 h |
| Ingress protection | IP66 per IEC/EN 60529 |
| Illumination unit with connection housing (option) | Light source model LTC-LV incl. power supply unit U IN = AC 115/230V;U OUT = DC 24V |
| Specify the length of the magnetic display to be illuminated when ordering. |
| Logo | Description | Region |
|---|---|---|
| EU declaration of conformity for BMI-LE illumination only | European Union | |
| Low voltage directive | ||
| RoHS directive |
| Logo | Description | Region | ||
|---|---|---|---|---|
| EU declaration of conformity for light source model LTC-LV only | European Union | |||
| ATEX directive Hazardous areas | ||||
| - Ex e mb | Zone 1 gas | II 2G Ex e mb IIC T5 ...T4 Gb | ||
| - Ex mb | Zone 21 dust | II 2D Ex mb IIIC T95 ...T130 °C Db IP66 |
| Replaced model | Current model | Description |
|---|---|---|
| MRA | BMD-SA | Aluminium case with T-slot, plastic rollers |
| MRK | BMD-HA | Aluminium case with T-slot, ceramic rollers |
| MRF | BMD-FA | Aluminium case with T-slot, stainless steel flaps (new) |
| MNAV | BMD-SV | Aluminium case stainless steel-lined, plastic rollers |
| MNKV | BMD-HV | Aluminium case stainless steel-lined, ceramic rollers |
| MRAV | BMD-SR | Stainless steel case with T-slot, plastic rollers (new) |
| MRFV | BMD-FR | Stainless steel case with T-slot, stainless steel flaps (new) |
| BMD-SS | Stainless steel case with T-slot, plastic rollers, hermetically sealed (new) | |
| BMD-FS | Stainless steel case with T-slot, stainless steel flaps, hermetically sealed (new) | |
| AVG2 | Successor:BMD-FS | Stainless steel rollers in glass tube, hermetically sealed (Phönix design) |
| AVG3 | Successor:BMD-FA | Aluminium case, stainless steel rollers (Phönix design) |
| AVV2 | Successor:BMD-FA | Aluminium case, stainless steel rollers (Vaihinger design) |
| Magnetic display model | Description |
|---|---|
| BMD-SA | Plastic rollers in aluminium case, with T-slot |
| BMD-SR | Plastic rollers in stainless steel case with T-slot |
| BMD-FA | Stainless steel flaps in aluminium case, with T-slot |
| BMD-FR | Stainless steel flaps in stainless steel case with T-slot |
Specifications
| Case | Aluminium, anodised |
|---|---|
| Length L | 180 ...6,000mm |
| Display element | Plastic rollers, PBT, red/white |
| Indicator window | Polycarbonate |
Specifications
| Case | Aluminium, anodised |
|---|---|
| Length L | 180 ...6,000mm |
| Display element | Stainless steel flaps, red/white |
| Indicator window | Glass |
Industry
Oil & Gas
Chemical, petrochemical, natural gas, offshore, shipbuilding, machine building, power generating equipment, power plants
Industry
Chemistry / Pharma
Process water and drinking water treatment, food industry, pharmaceutical industry
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