# Threshold Formaldehyde HCHO Detection Sensor (0-20ppm)

**Type:** Product page · **SKU:** SEN0595 · **Brand:** [DFRobot](https://core-electronics.com.au/brands/dfrobot-australia)
**Page:** https://core-electronics.com.au/threshold-formaldehyde-hcho-detection-sensor-0-20ppm.html ([markdown](https://core-electronics.com.au/threshold-formaldehyde-hcho-detection-sensor-0-20ppm.html.md))

Stay safe with the Threshold Formaldehyde HCHO sensor. Designed for optimal formaldehyde detection in various applications, including smart home systems...

## Pricing

- **Price:** $37.45 (inc GST) — $34.05 AUD, exc GST
- **Quantity discounts:** 6+ $32.35 (exc GST) · 12+ $30.98 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Oct 05 and Oct 09.

## Description

This formaldehyde gas sensor differs from most [gas sensors](https://core-electronics.com.au/sensors/gas-smoke.html) on the market as it does not provide specific gas concentration data. Instead, it detects whether the surrounding environment exceeds or falls below a fixed threshold. It operates on a wide voltage range of 5-24V, with high and low-level outputs. The sensor is equipped with an indicator light for easy observation of its status, making it user-friendly. When the sensor detects a gas concentration above the threshold, it outputs a high-level signal and the indicator light illuminates. Conversely, when the concentration falls below the threshold, it outputs a low-level signal and the indicator light turns off.

![Formaldehyde Sensor Overview](https://core-electronics.com.au/attachments/localcontent/overview_62364603d8d.png)

Formaldehyde, with the chemical formula CH2O or HCHO, is a colorless gas with a strong, pungent odor. It is soluble in alcohols and ethers. Acute formaldehyde poisoning is a systemic disease primarily characterized by damage to the eyes and respiratory system, caused by exposure to high concentrations of formaldehyde vapor. When the concentration reaches 0.08-0.09mg/m3 in ambient air, children may experience mild wheezing. At 0.1mg/m3, there may be odor and discomfort. At 0.5mg/m3, it can cause eye irritation and tear production. At 0.6mg/m3, it can cause discomfort or pain in the throat. Higher concentrations may result in nausea, vomiting, coughing, chest tightness, asthma, and even pulmonary edema. A concentration of 30mg/m3 can be fatal.

**Note:** The threshold of this sensor is factory-fixed and cannot be modified by the user. Custom threshold parameters can be set for bulk orders.

If you need to measure formaldehyde concentration accurately,we recommend the **[MEMS Formaldehyde HCHO Gas Detection Sensor.](https://www.dfrobot.com/product-2699.html)**

![Dimension Diagram of Formaldehyde Sensor](https://core-electronics.com.au/attachments/localcontent/dimension_16172a9121b.png)

Dimension Diagram of Formaldehyde Sensor

![Connection Port Diagram of Formaldehyde Sensor](https://core-electronics.com.au/attachments/localcontent/connection-port-definition-1_603630242bd.jpg)

Connection Port Diagram of Formaldehyde Sensor

### Features

- Threshold-based detection
- Wide voltage range, 5-24V
- High and low-level outputs
- Indicator light for status observation
- User-friendly design
 
### Applications

- Indoor air quality monitoring
- Safety and occupational health
- Environmental monitoring
- Smart home systems
- Research and development
 
### Specification

- Power Supply Voltage: 5-24V
- High level output range: 5-24V(Output high voltage = supply voltage)
- Load Current: <100mA
- Static Current: <10mA
- Detectable Gas: Formaldehyde (CH2O, HCHO)
- Resolution: 0.01ppm
- Repeatability: <2% of the output value
- Threshold: 0.06ppm˜0.075mg/m3 (Factory-fixed threshold, cannot be modified by the user)
- Maximum Load: 20ppm
- Response Time: <15s
- Zero-Point Output: -0.10~0.02ppm
- Output Mode: High-level and low-level signals
- Line sequence: Black line -OUT, Brown line -VCC, Blue line -GND
- Pressure Range: 1±0.1 standard atmospheric pressure
- Lifespan: 3 years (in air)
- Storage Environment: 10°C ~ 30°C
- Operating Temperature Range: -10°C ~ 50°C
- Operating Humidity Range: 15% ~ 90% RH
- Long-Term Stability: <2% of the signal value per month
- Dimensions: L\*W\*H=30.35\*47.4\*47.4mm
- Cable Length: 50cm
- Housing Material: Black PCV0 flame-retardant material
 
### Parts List

- Formaldehyde Detection Sensor x1

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/S/E/SEN0595-1.jpg)