Product Overview:

The 903 Multi-canister Sampler (Automatic) is a multi-channel sampler that collects volatile organic compounds in ambient air using negative pressure. It uses an orifice to limit gas flow and automatically adjusts flow through a flow regulator to achieve constant flow timed sampling. It is mainly used for unattended on-site VOCs sampling, and can also be used for sampling ambient air and other pollution source environmental gases.

Product Features:

• Sampling is achieved through negative pressure of the sampling canister, with the sample not passing through pressure pumps or other components to avoid contamination. All pipelines are silanized and inert-treated to ensure no reaction or adsorption loss during VOCs sampling
• Built-in two independent channels, each channel can support 8 (expandable to 16) sampling canisters for continuous sampling. Both channels can sample according to preset procedures or threshold-triggered sampling
• Built-in flow calibrator that measures the pressure change rate in the sampling canister to calculate the sampling flow rate, enabling automatic flow regulation and constant-speed sampling for up to six weeks
• Built-in high-precision atmospheric pressure sensor for more accurate and convenient sampling control
• Optional sampling canister placement rack (913 Multi-canister Sampling Adapter), easily accommodating 3L, 6L, and other sizes of sampling canisters for convenient connection and placement
• Each sampling canister inlet is connected to a pressure sensor for gas path leak detection. At the start of sampling, if the initial pressure is abnormal, it automatically switches to the next channel to ensure the authenticity and validity of the sample
• Can print sampling records and store 200 groups of sampling history records (expandable as needed)
• Localized Chinese operation interface for easier operation
• Optional lithium battery pack for power supply to meet field sampling needs
• Meets HJ-759-2015 and EPA methods TO-14A and TO-15 requirements