# Magnetic switch

> Magnetic switches for position sensing and automation, featuring reed contacts actuated by permanent magnets, suitable for extreme environments.

- Catalog code: msa
- Category: Level measurement › Accessories - Level
- Product page: https://avigan.com.ua/wika/en/products/msa
- Price: on request
- Supplier: AVIGAN (TOV VIKA Prylad), official WIKA partner in Ukraine

## Overview

The magnetic switch is made up of flat contact studs, which are hermetically sealed in a glass tube filled with inert gas (reed contact). By bringing a ...

## Applications

- Pulse generator for revolution, piston stroke and meter counting
- Running and standstill monitoring for machinery
- Amplitude of vibration monitoring for centrifuges
- Control of machine tools and also textile and printing machinery
- Filling scales, resonance conveyors and screens

## Special features

- Magnetic switches work properly under extreme environmental influences, e.g. dirt, humidity, gases, dust, chips etc.
- Stable switch point, reproducible switch point accuracy 0.01 mm
- Reed contact can be actuated from several directions
- Can be mounted in any orientation
- Can be actuated in a voltage-free condition, bistable variants can save signals and are particularly suitable for extremely long stroke lengths

## Specifications

| Parameter | Value |
|---|---|
| product family | MSA |
| short description | Magnetic switches for position sensing and automation, featuring reed contacts actuated by permanent magnets, suitable for extreme environments. |
| subcategory | Magnetic switch |
| ambient temp | -10 … 80 °C |
| ip rating | IP65 |
| languages in datasheet | en; de |
| technology | magnetic_switch |
| output signal | dry contact; reed contact; normally_open; normally_closed; change-over; bistable |
| accuracy | 0.01 mm |
| process connections | M10 x 1 thread; M12 x 1 thread; M18 x 1.5 thread; no thread (cylindrical body) |
| wetted parts material | brass; stainless steel; polyamide (glass-fibre reinforced); stainless_steel; polyamide; aluminium |
| process temp | -10 … 80 °C |
| electrical connection | cable or connector (model dependent) |

## Datasheet tables

| Magnetic switches, case forms and materials | Dimensions | Switch | Max. switching power AC/DC | Max. switching | Max.switching |
|---|---|---|---|---|---|
| behaviour voltage current AC/DC Mini magnetic switch in round stainless steel case |  |  |  |  |  |
| Model MSA-VS-Lx | L = 40 or 55 | Monostable | 10VA/5W | 230V | 0.5 A / 0.25 A |
| Magnetic switch in round polyamide case, glass-fibre reinforced |  |  |  |  |  |
| Model MSA-MRS 9 | L = 50 | Monostable | 10VA/5W | 230V | 0.5 A / 0.25 A |
| Model MSA-KRS 9 | L = 60 | Monostable | 60VA /30W | 230V | 1 A / 0.5 A |
| Model MSA-KRU 9 | L = 60 | Monostable | 30VA /20W | 230V | 0.5 A / 0.35 A |
| Model MSA-KWU 9 | L = 60 | Monostable | 50VA /30W | 230V | 1 A / 0.5 A |
| Model MSA-GMS 9 | L = 80 | Monostable | 100VA /50W | 230V | 1 A / 0.5 A |
| Model MSA-GMU 9 | L = 80 | Monostable | 30VA /20W | 230V | 0.5 A / 0.35 A |
| Model MSA-GMSM 16 | L = 75 | Bistable | 100VA /50W | 230V | 1 A / 0.5 A |
| Model MSA-GMOM 16 | L = 75 | Bistable | 100VA /50W | 230V | 1 A / 0.5 A |
| Model MSA-GMUM 16 | L = 75 | Bistable | 30VA /20W | 230V | 0.5 A / 0.35 A |
| Magnetic switch in round brass case |  |  |  |  |  |
| Model MSA-MRS 10 | M10 x 1 thread | Monostable | 10VA/5W | 230V | 0.5 A / 0.25 A |
| Model MSA-MRS 12 | M12 x 1 thread | Monostable | 60VA /30W | 230V | 1 A / 0.5 A |
| Model MSA-MRU 12 | M12 x 1 thread | Monostable | 30VA /20W | 230V | 0.5 A / 0.35 A |
| Model MSA-MRS 20 | M20 x 1 thread | Monostable | 60VA /30W | 230V | 1 A / 0.5 A |
| Model MSA-MRU 20 | M20 x 1 thread | Monostable | 30VA /20W | 230V | 0.5 A / 0.35 A |
| Magnetic switch in round polyamide case |  |  |  |  |  |
| Model MSA-GMS 18 | M18 x 1.5 thread | Monostable | 60VA /30W | 230V | 1 A / 0.5 A |
| Model MSA-GMU 18 | M18 x 1.5 thread | Monostable | 30VA /20W | 230V | 0.5 A / 0.35 A |
| Model MSA-GMUM 18 | M18 x 1.5 thread | Bistable | 100VA /50W | 230V | 1 A / 0.5 A |
| Magnetic switch in flat polyamide case, glass-fibre reinforced |  |  |  |  |  |
| Model MSA-DRS | L = 80 | Monostable | 60VA /30W | 230V | 1 A / 0.5 A |
| Model MSA-DRU | L = 80 | Monostable | 30VA /20W | 230V | 0.5 A / 0.35 A |
| Model MSA-DRSM | L = 80 | Bistable | 100VA /50W | 230V | 1 A / 0.5 A |
| Model MSA-DRUM | L = 80 | Bistable | 30VA /20W | 230V | 0.5 A / 0.35 A |
| Model MSA-DWU | L = 80 | Monostable | 50VA /30W | 230V | 1 A / 0.5 A |
| Model MSA-DGS | L = 80 | Monostable | 100VA /50W | 230V | 1 A / 0.5 A |
| Magnetic switch in aluminium case |  |  |  |  |  |
| Model MSA-FKS-AL | L = 50 | Monostable | 10VA/5W | 230V | 0.5 A / 0.25 A |
| Model MSA-FKOM-AL | L = 50 | Bistable | 10VA/5W | 230V | 0.5 A / 0.25 A |
| Model MSA-FKSM-AL | L = 50 | Bistable | 10VA/5W | 230V | 0.5 A / 0.25 A |
| Model MSA-FLS-AL | L = 80 | Monostable | 60VA /30W | 230V | 1 A / 0.5 A |
| Model MSA-FLU-AL | L = 80 | Monostable | 30VA /20W | 230V | 0.5 A / 0.35 A |
| Model MSA-FLSM-AL | L = 80 | Bistable | 100VA /50W | 230V | 1 A / 0.5 A |
| Model MSA-FLUM-AL | L = 80 | Bistable | 30VA /20W | 230V | 0.5 A / 0.35 A |
| Model MSA-FWU-AL | L = 80 | Monostable | 50VA /30W | 230V | 1 A / 0.5 A |
| Model MSA-FGMS-AL | L = 80 | Monostable | 100VA /50W | 230V | 1 A / 0.5 A |
| Magnetic switch in round stainless steel case |  |  |  |  |  |
| Model MSA-EVS-L70 (KRS) | L = 70 | Monostable | 60VA /30W | 230V | 1 A / 0.5 A |
| Model MSA-EVU-L70 (KRU) | L = 70 | Monostable | 30VA /20W | 230V | 0.5 A / 0.35 A |
| Model MSA-EVS-L100 (GMS) | L = 100 | Monostable | 100VA /50W | 230V | 1 A / 0.5 A |
| Model MSA-EVSM-L100 (GMSM) | L = 100 | Bistable | 100VA /50W | 230V | 1 A / 0.5 A |
| Model MSA-EVOM-L1004 (GMOM) | L = 100 | Bistable | 100VA /50W | 230V | 1 A / 0.5 A |
| Model MSA-EVUM-L100 (GMUM) | L = 100 | Bistable | 30VA /20W | 230V | 0.5 A / 0.35 A |
| Slot magnetic switch for non-contact actuation using a sheet iron flag in polyamide case |  |  |  |  |  |
| Model MSA-SRO | - | Monostable | 100VA /50W | 230V | 1 A / 0.5 A |
| Model MSA-SRU | - | Monostable | 30VA /20W | 230V | 0.5 A / 0.35 A |
| Model MSA-SWO | - | Monostable | 50VA /30W | 230V | 1 A / 0.5 A |
| Model MSA-SWU | - | Monostable | 50VA /30W | 230V | 1 A / 0.5 A |

| Specifications | 2 |
|---|---|
| Switching function | Normally open |
| Switch behaviour | Monostable |
| Contact material | Rhodium |
| Switching power | AC 10VA DC5W |
| Switching voltage | AC/DC 230V |
| Switching current | AC 0.5 A DC 0.25 A |
| Switching frequency | 1,000 1/sec |
| Switch hysteresis | approx.5mm |
| Permissible temperature | -10 ...+80 °C |
| Ingress protection | IP54 |
| Connection cable | 2-wire PVC (specify length when ordering) |
| Case | Stainless steel |

| Specifications | 2 |
|---|---|
| Switching function | Normally open |
| Switch behaviour | Monostable |
| Contact material | Rhodium |
| Switching power | AC 10VA DC5W |
| Switching voltage | AC/DC 230V |
| Switching current | AC 0.5 A DC 0.25 A |
| Switching frequency | 1,000 1/sec |
| Switch hysteresis | approx.5mm |
| Permissible temperature | -10 ...+80 °C |
| Ingress protection | IP54 |
| Connection cable | 2-wire PVC (specify length when ordering) |
| Case | Stainless steel |

| Specifications | 2 |
|---|---|
| Switching function | Normally open |
| Switch behaviour | Monostable |
| Contact material | Rhodium |
| Switching power | AC 10VA DC5W |
| Switching voltage | AC/DC 230V |
| Switching current | AC 0.5 A DC 0.25 A |
| Switching frequency | 1,000 1/sec |
| Switch hysteresis | approx.5mm |
| Permissible temperature | -10 ...+80 °C |
| Ingress protection | IP65 |
| Connection cable | 2-wire PVC (specify length when ordering) |
| Case | Polyamide, glass-fibre reinforced |

| Specifications | 2 |
|---|---|
| Switching function |  |
| Model MSA-KRS 9 | Normally open |
| Model MSA-KRU 9 | Change-over |
| Switch behaviour | Monostable |
| Contact material | Rhodium |
| Switching power |  |
| Model MSA-KRS 9 | AC 60VA DC30W |
| Model MSA-KRU 9 | AC 30VA DC20W |
| Switching voltage | AC/DC 230V |
| Switching current |  |
| Model MSA-KRS 9 | AC 1 A DC 0.5 A |
| Model MSA-KRU 9 | AC 0.5 A DC 0.35 A |
| Switching frequency | 300 1/sec |
| Switch hysteresis | approx.5mm |
| Permissible temperature | -10 ...+80 °C |
| Ingress protection | IP65 |
| Connection cable | (specify length when ordering) |
| Model MSA-KRS 9 | 2-wire PVC |
| Model MSA-KRU 9 | 3-wire PVC |
| Case | Polyamide, glass-fibre reinforced |

| Specifications | 2 |
|---|---|
| Switching function | Change-over |
| Switch behaviour | Monostable |
| Contact material | Rhodium |
| Switching power | AC 50VA DC30W |
| Switching voltage | AC/DC 230V |
| Switching current | AC 1 A DC 0.5 A |
| Switching frequency | 100 1/sec |
| Switch hysteresis | approx. 2 ...3mm |
| Permissible temperature | -10 ...+80 °C |
| Ingress protection | IP65 |
| Connection cable | 2-wire PVC (specify length when ordering) |
| Case | Polyamide, glass-fibre reinforced |

| Specifications | 2 |
|---|---|
| Switching function |  |
| Model MSA-GMS 9 | Normally open |
| Model MSA-GMU 9 | Change-over |
| Switch behaviour | Monostable |
| Contact material | Rhodium |
| Switching power |  |
| Model MSA-GMS 9 | AC 100VA DC50W |
| Model MSA-GMU 9 | AC 30VA DC20W |
| Switching voltage | AC/DC 230V |
| Switching current |  |
| Model MSA-GMS 9 | AC 1 A DC 0.5 A |
| Model MSA-GMU 9 | AC 0.5 A DC 0.35 A |
| Switching frequency | 300 1/sec |
| Switch hysteresis |  |
| Model MSA-GMS 9 | approx. 3 ...4mm |
| Model MSA-GMU 9 | approx.5mm |
| Permissible temperature | -10 ...+80 °C |
| Ingress protection | IP65 |
| Connection cable | (specify length when ordering) |
| Model MSA-GMS 9 | 2-wire PVC |
| Model MSA-GMU 9 | 3-wire PVC |
| Case | Polyamide, glass-fibre reinforced |

| Specifications | 2 |
|---|---|
| Switching function |  |
| Model MSA-GMSM 16 | Normally open |
| Model MSA-GMOM 16 | Normally closed |
| Model MSA-GMUM 16 | Change-over |
| Switch behaviour | Bistable |
| Contact material | Rhodium |
| Switching power |  |
| Models MSA-GMSM 16 and MSA-GMOM16 | AC 100VA DC50W |
| Model MSA-GMUM 16 | AC 30VA DC20W |
| Switching voltage | AC/DC 230V |
| Switching current |  |
| Models MSA-GMSM 16 and MSA-GMOM16 | AC 1 A DC 0.5 A |
| Model MSA-GMUM 16 | AC 0.5 A DC 0.35 A |
| Switching frequency | 300 1/sec |
| Permissible temperature | -10 ...+80 °C |
| Ingress protection | IP65 |
| Connection cable | (specify length when ordering) |
| Model MSA-GMSM 16 | 2-wire PVC |
| Model MSA-GMOM 16 | 2-wire PVC |
| Model MSA-GMUM 16 | 3-wire PVC |
| Case | Polyamide, glass-fibre reinforced |

### Specifications

| Switching function | Normally open |
|---|---|
| Switch behaviour | Monostable |
| Contact material | Rhodium |
| Switching power | AC 10VA DC5W |
| Switching voltage | AC/DC 230V |
| Switching current | AC 0.5 A DC 0.25 A |
| Switching frequency | 1,000 1/sec |
| Switch hysteresis | approx.5mm |
| Permissible temperature | -10 ...+80 °C |
| Ingress protection | IP54 |
| Connection cable | 2-wire PVC (specify length when ordering) |
| Case | Brass |

| Specifications | 2 |
|---|---|
| Switching function |  |
| Model MSA-MRS 12 | Normally open |
| Model MSA-MRU 12 | Change-over |
| Switch behaviour | Monostable |
| Contact material | Rhodium |
| Switching power |  |
| Model MSA-MRS 12 | AC 60VA DC30W |
| Model MSA-MRU 12 | AC 30VA DC20W |
| Switching voltage | AC/DC 230V |
| Switching current |  |
| Model MSA-MRS 12 | AC 1 A DC 0.5 A |
| Model MSA-MRU 12 | AC 0.5 A DC 0.35 A |
| Switching frequency | 300 1/sec |
| Switch hysteresis | approx.5mm |
| Permissible temperature | -10 ...+80 °C |
| Ingress protection | IP54 |
| Connection cable | (specify length when ordering) |
| Model MSA-MRS 12 | 2-wire PVC |
| Model MSA-MRU 12 | 3-wire PVC |
| Case | Brass |

| Specifications | 2 |
|---|---|
| Switching function |  |
| Model MSA-MRS 20 | Normally open |
| Model MSA-MRU 20 | Change-over |
| Switch behaviour | Monostable |
| Contact material | Rhodium |
| Switching power |  |
| Model MSA-MRS 20 | AC 60VA DC30W |
| Model MSA-MRU 20 | AC 30VA DC20W |
| Switching voltage | AC/DC 230V |
| Switching current |  |
| Model MSA-MRS 20 | AC 1 A DC 0.5 A |
| Model MSA-MRU 20 | AC 0.5 A DC 0.35 A |
| Switching frequency | 300 1/sec |
| Switch hysteresis |  |
| Model MSA-MRS 20 | approx. 3 ...4mm |
| Model MSA-MRU 20 | approx.5mm |
| Permissible temperature | -10 ...+80 °C |
| Ingress protection | IP65 |
| Connection cable | (specify length when ordering) |
| Model MSA-MRS 20 | 2-wire PVC |
| Model MSA-MRU 20 | 3-wire PVC |
| Case | Brass |

| Specifications | 2 |
|---|---|
| Switching function |  |
| Model MSA-GMS 18 | Normally open |
| Model MSA-GMU 18 | Change-over |
| Switch behaviour | Monostable |
| Contact material | Rhodium |
| Switching power |  |
| Model MSA-GMS 18 | AC 60VA DC30W |
| Model MSA-GMU 18 | AC 30VA DC20W |
| Switching voltage | AC/DC 230V |
| Switching current |  |
| Model MSA-GMS 18 | AC 1 A DC 0.5 A |
| Model MSA-GMU 18 | AC 0.5 A DC 0.35 A |
| Switching frequency | 300 1/sec |
| Switch hysteresis | approx.5mm |
| Permissible temperature | -10 ...+80 °C |
| Ingress protection | IP65 |
| Connection cable | (specify length when ordering) |
| Model MSA-GMS 18 | 2-wire PVC |
| Model MSA-GMU 18 | 3-wire PVC |
| Case | Polyamide |

| Specifications | 2 |
|---|---|
| Switching function | Change-over |
| Switch behaviour | Bistable |
| Contact material | Rhodium |
| Switching power | AC 40VA DC20W |
| Switching voltage | AC/DC 230V |
| Switching current | AC 1 A DC 0.5 A |
| Switching frequency | 300 1/sec |
| Permissible temperature | -10 ...+80 °C |
| Ingress protection | IP65 |
| Connection cable | 3-wire PVC (specify length when ordering) |
| Case | Polyamide |

| Specifications | 2 |
|---|---|
| Switching function |  |
| Model MSA-DRS | Normally open |
| Model MSA-DRU | Change-over |
| Switch behaviour | Monostable |
| Contact material | Rhodium |
| Switching power |  |
| Model MSA-DRS | AC 60VA DC30W |
| Model MSA-DRU | AC 30VA DC20W |
| Switching voltage | AC/DC 230V |
| Switching current |  |
| Model MSA-DRS | AC 1 A DC 0.5 A |
| Model MSA-DRU | AC 0.5 A DC 0.35 A |
| Switching frequency | 300 1/sec |
| Switch hysteresis | approx.5mm |
| Permissible temperature | -10 ...+80 °C |
| Ingress protection | IP65 |
| Connection cable | (specify length when ordering) |
| Model MSA-DRS | 2-wire PVC |
| Model MSA-DRU | 3-wire PVC |
| Case | Polyamide, glass-fibre reinforced |

| Specifications | 2 |
|---|---|
| Switching function |  |
| Model MSA-DRSM | Normally open |
| Model MSA-DRUM | Change-over |
| Switch behaviour | Bistable |
| Contact material | Rhodium |
| Switching power |  |
| Model MSA-DRSM | AC 100VA DC50W |
| Model MSA-DRUM | AC 30VA DC20W |
| Switching voltage | AC/DC 230V |
| Switching current |  |
| Model MSA-DRSM | AC 1 A DC 0.5 A |
| Model MSA-DRUM | AC 0.5 A DC 0.35 A |
| Switching frequency | 300 1/sec |
| Permissible temperature | -10 ...+80 °C |
| Ingress protection | IP65 |
| Connection cable | (specify length when ordering) |
| Model MSA-DRSM | 2-wire PVC |
| Model MSA-DRUM | 3-wire PVC |
| Case | Polyamide, glass-fibre reinforced |

| Specifications | 2 |
|---|---|
| Switching function | Change-over |
| Switch behaviour | Monostable |
| Contact material | Tungsten |
| Switching power | AC 50VA DC30W |
| Switching voltage | AC/DC 230V |
| Switching current | AC 1 A DC 0.5 A |
| Switching frequency | 100 1/sec |
| Switch hysteresis | approx. 2 ...3mm |
| Permissible temperature | -10 ...+80 °C |
| Ingress protection | IP65 |
| Connection cable | 3-wire PVC (specify length when ordering) |
| Case | Polyamide, glass-fibre reinforced |

| Specifications | 2 |
|---|---|
| Switching function | Normally open |
| Switch behaviour | Monostable |
| Contact material | Rhodium |
| Switching power | AC 100VA DC50W |
| Switching voltage | AC/DC 230V |
| Switching current | AC 1 A DC 0.5 A |
| Switching frequency | 300 1/sec |
| Switch hysteresis | approx. 3 ...4mm |
| Permissible temperature | -10 ...+80 °C |
| Ingress protection | IP65 |
| Connection cable | 2-wire PVC (specify length when ordering) |
| Case | Polyamide, glass-fibre reinforced |

| Specifications | 2 |
|---|---|
| Switching function | Normally open |
| Switch behaviour | Monostable |
| Contact material | Rhodium |
| Switching power | AC 10VA DC5W |
| Switching voltage | AC/DC 230V |
| Switching current | AC 0.5 A DC 0.25 A |
| Switching frequency | 1,000 1/sec |
| Switch hysteresis | approx.5mm |
| Permissible temperature | -10 ...+80 °C |
| Ingress protection | IP65 |
| Connection cable | 2-wire PVC (specify length when ordering) |
| Case | Aluminium |

### Specifications

| Switching function | 2 |
|---|---|
| Model MSA-FKSM-AL | Normally open |
| Model MSA-FKOM-AL | Normally closed |
| Switch behaviour | Bistable |
| Contact material | Rhodium |
| Switching power | AC 10VA DC5W |
| Switching voltage | AC/DC 230V |
| Switching current | AC 0.5 A DC 0.25 A |
| Switching frequency | 1,000 1/sec |
| Permissible temperature | -10 ...+80 °C |
| Ingress protection | IP65 |
| Connection cable | (specify length when ordering) |
| Model MSA-FKSM-AL | 2-wire PVC |
| Model MSA-FKOM-AL | 2-wire PVC |
| Case | Aluminium |

| Specifications | 2 |
|---|---|
| Switching function |  |
| Model MSA-FLS-AL | Normally open |
| Model MSA-FLU-AL | Change-over |
| Switch behaviour | Monostable |
| Contact material | Rhodium |
| Switching power |  |
| Model MSA-FLS-AL | AC 60VA DC30W |
| Model MSA-FLU-AL | AC 30VA DC20W |
| Switching voltage | AC/DC 230V |
| Switching current |  |
| Model MSA-FLS-AL | AC 1 A DC 0.5 A |
| Model MSA-FLU-AL | AC 0.5 A DC 0.35 A |
| Switching frequency | 300 1/sec |
| Switch hysteresis | approx.5mm |
| Permissible temperature | -10 ...+80 °C |
| Ingress protection | IP65 |
| Connection cable | (specify length when ordering) |
| Model MSA-FLS-AL | 2-wire PVC |
| Model MSA-FLU-AL | 3-wire PVC |
| Case | Aluminium |

## Documents

- [ds_sp3002_en_co_0c4cf4](https://avigan.com.ua/wika/docs/wika/ds_sp3002_en_co.pdf) — PDF, 1673 KB, en