# UHV Compatible Limit Switches

> UHV Compatible Switch: VLS1 & VLS3

Canonical product page: [https://arunmicro.com/products/vacuum-compatible-limit-switch/](https://arunmicro.com/products/vacuum-compatible-limit-switch/)

PEEK UHV compatible limit switches. Available in two forms (round and rectangular). Suitable for use to 1.3 x 10-10 mBar (1 x 10-10 Torr)

## Product details

- Product code: `vlsx`
- Category: [Accessories](https://arunmicro.com/products/category/accessories/)

## Order codes

| Order code | Description | Price |
| --- | --- | --- |
| VLS1 | UHV Compatible Limit Switch (Round) | £268.00 |
| VLS3 | UHV Compatible Limit Switch (Rectangular) | £268.00 |

## Overview

UHV compatible limit switches used for repeatable limit detection for in-vacuum motion systems.

The switch is normally-closed (NC) and can be connected directly to an SMD3 or SMD4 stepper motor drive.

- UHV-compatible material construction

- Suitable for use to 1.3 x 10-10 mBar (1 x 10-10 Torr)

- Repeatability: ± <1µm

- Overtravel: 2 mm

- Switching current: 50 mA

- Switching voltage: 30 Vdc

- High temperature - bakeable to 200°C

- Normally-closed (NC)

- 22 AWG polyimide insulated wires

- VLS1 - 3/8-24 UNF external thread with 2 matching nuts

## Documentation and downloads

- [Datasheet](https://arunmicro.com/documentation/Datasheet_VLS.pdf)
- [CAD_VLS1 (.STEP)](https://arunmicro.com/downloads/CAD_VLS1.STEP)
- [CAD_VLS3 (.STEP)](https://arunmicro.com/downloads/CAD_VLS3.STEP)

## Related products

- [MLF18 UHV Connectors](https://arunmicro.com/products/vacuum-side-connector/): UHV, 18-way Vacuum-Side Connectors.
- [UHV Wiring Accessories](https://arunmicro.com/products/uhv-wiring-accessories/): Cable clamps and terminal blocks for in-vacuum cabling.
- [VCC7 UHV Connectors](https://arunmicro.com/products/vcc7-vacuum-side-connectors/): UHV, 7-Way Vacuum Compatible Connectors.
- [VCC7 and MLF18 Pins & Tooling](https://arunmicro.com/products/connector-pins-and-tooling/): Crimp-contacts and tools for use with the VCC7 and MLF18 connectors.
- [SMD3 Stepper Motor Drive](https://arunmicro.com/products/smd3-stepper-motor-drive/): Stepper motor drive optimised for use with AML UHV-compatible motors. Four operating modes including USB remote from a host PC and opto-isolated step and direction inputs. Continuous monitoring of motor temperature is provided with automatic shutdown to prevent motor damage.
- [SMD4 Stepper Motor Drive](https://arunmicro.com/products/smd4-stepper-motor-drive/): Stepper motor drive optimised for use with AML UHV-compatible motors. Features advanced connectivity with USB, Ethernet and RS232/485 interfaces. Optional encoder module for incremental and absolute encoders