Brand: FORENSICS DETECTORS
Model: FD-FILTER-MOISTURE-LARGE
Compatible Detectors: All
- ⚛️ Description: This is a generic "large" moisture filter, otherwise known as a humidity filter, water-vapor filter, or air dryer filter. This filter is used to reduce the moisture content of an air or gas sample prior to analysis by a gas sensor. Removing moisture is important as most sensor technologies have cross-sensitivity to water vapor. The filter can be disassembled to change or recharge the silica beads. These filters are commonly used in combustion line setups, breath analysis, or in humid sample environments (tanks, silos, caves, etc...).
- 📶 How does it work? Silica gel is a desiccant that can hold 30 to 40% of its weight in water. Water molecules stick to silica bead surfaces through adsorption. Each bead has many tiny interconnected pores, resulting in a high surface area. These desiccant beads are dark blue and will change to a light pink when they have absorbed the maximum amount of moisture and need to be changed. Note: when they start to turn pink, they have usually about 40% life left. How soon you change them depends on personal preference and how important it is that you get no moisture in your air line.
- 👫 Instructions: Connect the filter in line with the air supply line tubing. The filter is bi-directional so it does not matter which way it is connected. One end is the input and the other is the output to the sensor.
- 🔣 Specifications:
- Dimensions: 5 cm x 26 cm / 1.97 in x 10.24 in
- Weight: 1 lb
- Barb Length: 1 in
- Barb Outer Diameter: 4.8 mm / 0.19 in
- Active Material: blue beads cobalt chloride (0.005%)