# Gravity: SFA40 Formaldehyde Sensor

- Category: Sensors > Environment > Air quality & gas
- Also known as: DFRobot HCHO, Gravity: SFA40 Formaldehyde Sensor, Gravity: SFA40甲醛感测器, HCHO Formaldehyde Sensor Module, HCHO sensor, SFA40, formaldehyde sensor, formaldehyde sensor module
- Product page: https://partlark.xyz/p/c-gravity-sfa40-formaldehyde-sensor-348c4ed3a1

## Details

- Identified as: SFA40 / formaldehyde sensor
- Brand: DFROBOT

## Listings

Cached marketplace data: goods prices in CNY, freight, taxes and fees excluded. Prices, stock and options can change; confirm on the listing before ordering.

### 1. DFRobot官方品牌店 (Taobao)

- Listing price: ¥280.00 (option and pack size unconfirmed)
- Listing status: listed; details checked 2026-11-12
- Marketplace listing: https://item.taobao.com/item.htm?id=1021408094812
- Order via Superbuy (affiliate link): https://www.superbuy.com/en/page/buy/?platform=TB&id=1021408094812&partnercode=EU3LLB&trackPayload=pc_share
- Matching options (PartLark variant links for the haul or bulk add):
  - Default (option price ¥287.59, pack size unknown, stock 200, best pick): https://partlark.xyz/p/c-gravity-sfa40-formaldehyde-sensor-348c4ed3a1/variant?listing=11644&sku=0

### 2. DFRobot官方品... (Taobao)

- Listing price: ¥239.00 (option and pack size unconfirmed)
- Listing status: listed; details checked 2026-06-02; historical data
- Marketplace listing: https://item.taobao.com/item.htm?id=555167854600
- Order via Superbuy (affiliate link): https://www.superbuy.com/en/page/buy/?platform=TB&id=555167854600&partnercode=EU3LLB&trackPayload=pc_share

## Ordering

Paste one or more variant links (one per line) into https://partlark.xyz/basket/bulk-add to add them to a haul. Matches are checked automatically and are not a guarantee of compatibility.