RAE Systems - VOC Zeroing Tubes

VOC Zeroing tubes are single-use charcoal filters intended for zero calibration, especially for the ppbRAE 3000, where a zero gas with <5 ppb isobutylene-equivalent response is required. Other charcoal tubes with higher capacity might also be used for this purpose, but once they have
been opened for some time, they tend to absorb VOCs from the ambient air and then release ppb levels of VOCs back into the zero calibration
stream. The VOC Zeroing tubes ensure a clean background by virtue of being sealed in glass until just before use. These tubes could also
be used to remove organic vapor interferences in other sensors such as electrochemical CO sensors or unfiltered CO tubes.

VOC/CO2 Zeroing Tubes
These tubes are identical to the VOC Zeroing Tubes, but with an additional layer to remove CO2 for multi-gas meters having both PID and CO2 sensors.

RAE Systems' large selection of Colorimetric Gas Detection Tubes offer quick, on-the-spot measurements of over 300 gases and vapors at low cost. The tubes can test for gases and are easy to read with a sharp, clear color change that provides accuracy with no need for calibration.

Features

• Easy to read, providing a sharp, clear color change directly corresponding to the concentration of gas present
• No calibration or other maintenance required
• Wide assortment of tubes available to detect over 300 gases and vapors
• Springless piston design accurately draws 50 and 100 cc volumes
• Compatible with LP-1200 piston hand pump, a reliable way to draw samples of an exact volume required for the most accurate measurements
• Tight vacuum seal is formed by a greased plunger gasket
• Tapered rubber inlet accommodates a range of tube diameters for different types of tubes
• Inlet filter prevents glass pieces and dust from entering the shaft
• End-of-flow indicator in the handle turns white when the gas sampling is complete
• Pump stroke counter is rotated to keep track of the number of strokes completed
• Using the standard number of pump strokes, the concentration of the gas is read from stain length directly matched to the printed scale after the listed sampling time has elapsed