DD‑Scientific | Storage Requirements for Electrochemical Gas Sensors
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DD‑Scientific | Storage Requirements for Electrochemical Gas Sensors


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DDS electrochemical gas sensors are electrochemical consumables. Storage conditions directly determine the subsequent performance of the device. Store the sensors in a dry, well‑ventilated and light‑protected environment with a storage temperature ranging from 0 °C to 20 °C. Avoid direct sunlight and heat sources. Keep the original packaging. Do not block the breathable membrane and vent holes. Do not remove surface labels or the breathable protective membrane. Damaged breathable membranes will greatly increase the risk of electrolyte leakage. Keep away from corrosive vapours and volatile organic solvent gases. Such substances can penetrate through the breathable membrane into the sensor and cause electrode poisoning and damage. Avoid dropping or impacting the sensor during handling. Shock from drops may damage internal electrodes and electrolyte structures, resulting in performance degradation even if no external damage is visible. Sensors that have been stored for a long period must not be put into service directly. Power‑on ageing and recalibration are required. Only after verifying normal sensitivity may the sensor be fitted to detection equipment.

1. Why Proper Storage Is Important

Electrochemical gas sensors contain liquid electrolyte and permeable membranes sensitive to environmental conditions. Improper storage may result in:• Shortened sensor service life• Drifting or unstable readings• Slow response time• Degraded performance

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2. Storage Requirements

2.1 Original Packaging

• Always store sensors in the sealed packaging supplied by the manufacturer.• The packaging protects the sensor from contamination, moisture and exposure to organic solvents.

2.2 Environmental Conditions

Temperature

• Maintain storage temperature between 0 °C and 20 °C.• Keep temperature as stable as possible; avoid rapid or repeated temperature fluctuations.

Humidity

• Store in a clean and dry environment.• Avoid high‑humidity conditions that may disrupt electrolyte balance. Liquid moisture can block vent holes, restrict gas flow to the sensor and weaken signal output.

2.3 Chemical Exposure

Do not store sensors in areas with:

  • Organic solvents

  • Flammable liquids

  • Strong vapours or fumes

These substances can diffuse into the sensor and impair performance.

2.4 Sensors Installed in Instruments

• The same storage rules apply to sensors already fitted inside instruments.• Instruments must be stored in a controlled, clean and dry environment within the recommended temperature range.

3. Effects of Temperature Drift

Frequent or large temperature fluctuations may:• Alter electrolyte pressure• Cause internal condensation inside the sensor• Accelerate component deterioration• Produce unstable or inaccurate readings
Maintaining stable environmental conditions is critical for long‑term performance.