Threshold Formaldehyde HCHO Detection Sensor (0-20ppm)

DFRobotSKU: RB-Dfr-1344
Manufacturer #: SEN0595

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  • Threshold Formaldehyde HCHO Detection Sensor (0-20ppm)
  • Features an indicator light for easy monitoring
  • Operates within a broad voltage range of 5-24V
  • Detects formaldehyde levels exceeding or below a set threshold
  • Housed in black PCV0 flame-retardant material

The Threshold Formaldehyde HCHO Detection Sensor (0-20ppm) is a unique gas sensor that does not provide specific gas concentration data. Instead, it is designed to detect whether the surrounding environment's formaldehyde levels exceed or fall below a predetermined threshold. This sensor operates within a broad voltage range and offers high and low-level outputs.

One of the distinguishing features of this sensor is its indicator light, which allows for easy monitoring of its operational status. When the sensor detects a formaldehyde concentration above the threshold, it emits a high-level signal and the indicator light illuminates. On the other hand, when the concentration dips below the threshold, the sensor outputs a low-level signal and the indicator light extinguishes.

Formaldehyde, denoted chemically as CH2O or HCHO, is a colorless gas with a potent, pungent odor. It is soluble in alcohols and ethers. Exposure to high concentrations of formaldehyde vapor can lead to acute formaldehyde poisoning, a systemic disease primarily characterized by damage to the eyes and respiratory system. Symptoms can range from mild wheezing in children when the concentration reaches 0.08-0.09 mg/m3 in ambient air, to eye irritation, throat discomfort, nausea, vomiting, coughing, chest tightness, asthma, and even pulmonary edema at higher concentrations. A concentration of 30 mg/m3 can be lethal.

Please note that the threshold of this sensor is factory-fixed and cannot be modified by the user. For accurate measurement of formaldehyde concentration, the MEMS Formaldehyde HCHO Gas Detection Sensor is recommended.

  • 1x Threshold Formaldehyde HCHO Detection Sensor (0-20ppm)

  • 30.35 x 47.4 x 47.4 mm (L x W x H)
  • Cable Length: 50 cm
  • Power Supply Voltage: 5 - 24 V
  • High-level output range: 5 - 24 V (Output high voltage = supply voltage)
  • Load Current: <100 mA
  • Static Current: <10 mA
  • Detectable Gas: Formaldehyde (CH2O, HCHO)
  • Resolution: 0.01 ppm
  • Repeatability: <2% of the output value
  • Threshold: 0.06ppm ≈ 0.075 mg/m3 (Factory-fixed threshold, cannot be modified by the user)
  • Maximum Load: 20 ppm
  • Response Time: <15s
  • Zero-Point Output: -0.10 ~ 0.02 ppm
  • 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 ~ 30 °C
  • Operating Temperature Range: -10 ~ 50 °C
  • Operating Humidity Range: 15% ~ 90% RH
  • Long-Term Stability: <2% of the signal value per month
  • Housing Material: Black PCV0 flame-retardant material

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