# Optomax digital liquid level sensor

Manufacturer: Adafruit  |  MPN: 3397  |  Category: float-switch
Canonical: https://partsgraph.ai/catalog/parts/adafruit-float-switch
Image: https://partsgraph.ai/catalog/img/adafruit-float-switch.jpg (photo: Adafruit, CC BY-SA; sha256 971109efb1e4)

## Attributes (each with provenance)

- **Type**: Liquid Level Sensor
  - source: https://www.adafruit.com/product/3397
  - quote: "Optomax Digital Liquid Level Sensor [LLC200D3SH-LLPK1] : Adafruit Industries, Unique & fun DIY"
- **Supply voltage range**: 4.5 to 15.4 VDC
  - source: https://www.adafruit.com/product/3397
  - quote: "an sink and source up to 100mA at a supply voltage range of 4.5 to 15.4VDC - so you can even use it to directly control a transistor o"
- **Output sink/source (max)**: 100 mA
  - source: https://www.adafruit.com/product/3397
  - quote: "vel output is push-pull type, and can sink and source up to 100mA at a supply voltage range of 4.5 to 15.4VDC - so you can ev"
- **Operating temperature**: -25 to 80 °C
  - source: https://www.adafruit.com/product/3397
  - quote: "nting and for use in standard operating temperature ranges (-25 to 80°C). Features: Reverse polarity, ESD and transient over-voltag"
- **Output type**: push-pull
  - source: https://www.adafruit.com/product/3397
  - quote: "liquid. The microcontroller-friendly logic level output is push-pull type, and can sink and source up to 100mA at a supply volta"
- **Housing material**: Polysulfone
  - source: https://www.adafruit.com/product/3397
  - quote: "he surface) can trigger it. Comes in a chemically resistant Polysulfone housing material - the standard choice for most application"
- **Weight**: 8.4 g
  - source: https://www.adafruit.com/product/3397
  - quote: "Play video: New Products 8/2/2017 Technical Details Weight: 8.4g / 0.3oz Wire length ( not including sensor): ~240mm / ~9.5""
- **Wire length**: 240 mm
  - source: https://www.adafruit.com/product/3397
  - quote: "Weight: 8.4g / 0.3oz Wire length ( not including sensor): ~240mm / ~9.5" Datasheet Application-note May We Also Suggest... L"

## Vendors

- Adafruit: https://www.adafruit.com/product/3397 (~USD 39.95, indicative as of 2026-08-18)

## Datasheets

- Float switch product page: https://www.adafruit.com/product/3397

Used in builds: plant-waterer (roles: level-sensor)

Machine feed of the whole catalogue: https://partsgraph.ai/catalog/feed.json