Holybro H-Flow (Optical Flow and Distance Sensor Module)
£125.00 Inc. VAT
An Optical Flow Sensor can be used to help your drone maintain a position lock, without using GPS.
In stock|Next shipping: 16/03/2026
The Holybro H-Flow is a compact optical flow and distance sensor module that combines a PixArt PAA3905E1 optical flow sensor, a Broadcom AFBR-S50LV85D distance sensor, and an InvenSense ICM-42688-P 6-axis IMU. This all-in-one design simplifies installation, while the onboard infrared LED enhances visibility in low-light conditions.
The H-Flow features a Pixhawk-standard 4-pin CAN connector, ensuring seamless integration with Pixhawk-compatible controllers via the CAN port. Utilizing the DroneCAN protocol, it offers reliable and high-speed data transmission between the sensor and the flight controller.
Feature
- Integrated Optical Flow and Rangefinder Module
- PixArt Optical Flow Sensor for Accurate Motion Tracking
- Broadcom ToF Sensor for Precise Distance Measurement
- Infrared LED for Optical Low-Light Performance
- DroneCAN Protocol
Reference Links
- PixArt PAA3905E1 Optical Flow Sensor
- Tracks under low light conditions of >5 lux
- Effective Viewing angle up to 42°
- Wide working ranges from 80mm up to 30m
- Up to 7.4 rad/s
- 40mW IR LED built onto the board for improved low-light operation
- Broadcom AFBR-S50LV85D Time-of-Flight Distance Sensor
- Integrated 850 nm laser light source
- Field-of-View (FoV) of 12.4° x 6.2° with 32 pixels
- Typical distance sensing range up to 30m
- Operation of up to 200k Lux ambient light
- Works well on all surface conditions
- Transmitter beam of 2° x 2° to illuminate between 1 and 3 pixels
- InvenSense ICM-42688-P 6-Axis IMU
- STM32F412CEU6 MCU
- Pixhawk Standard CAN Connector (4 Pin JST GH)
- Compact Form Factor
- Software-Controlled CAN Termination
- Weight: 15.2g (3.5g without casing)
Included:
- 1x H-Flow
- 4-pin GH cable
- 2x M2.5 Screws
- 2x M2.5 Nylon Locking Hex Nuts
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SHIPPING & DELIVERY
We are based in the UK and ship to most destinations worldwide.
We dispatch orders during the times shown on our Dispatch Schedule. Orders placed before the daily dispatch cutoff will ship the same day (subject to stock availability). Orders placed after the cutoff will ship on the next scheduled dispatch day.
A confirmation email is sent once your order has been packed. If you need to amend your order, please contact us as soon as possible — once shipped, we’re unable to make changes.
We work with trusted delivery partners including Royal Mail, DHL, UPS, Fedex and Parcelforce. If you have a delivery requirement or would like to arrange collection, please get in touch.
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Shipping to the UK
- Order before the daily dispatch cutoff for same day dispatch.
- FREE delivery available on qualifying orders over £99 (under 1kg).
For small, low-value orders, Royal Mail First Class is our most economical option. Royal Mail Tracked 24 is the most popular choice, offering full tracking and flexible delivery options. For guaranteed next working day delivery, we recommend Royal Mail Special Delivery.
Royal Mail delivers to residential addresses Monday to Saturday, while courier services (including DHL) typically deliver Monday to Friday.
International Postage
- USA orders: Import duties and taxes are prepaid by us — no additional customs charges on delivery.
- Other destinations: Customs duties or import taxes may apply and are the responsibility of the recipient.
Smaller, lower-value orders may be sent via Airmail or tracked postal services. Economy road and express air courier options are available depending on destination. For faster delivery, we recommend express air courier services such as DHL Express, which typically deliver within 1–2 working days across Europe and a few working days for most other destinations.
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