Xonteck 912 Multi-Canister Sampling Adapter

Overview

The Xonteck 912 Multi-Canister Sampling Adapter is a precision-engineered, field-deployable interface designed to automate sequential sampling of ambient or stack air into up to 16 electropolished stainless steel canisters (e.g., SilcoCan®, Summa®). It operates as a modular extension of the Xonteck 901 Canister Sampling Instrument, accepting its control signals and timing commands to execute programmable, time-based canister switching. The device implements a robust 16-port rotary valve actuated by a stepper motor, ensuring zero-dead-volume gas pathways constructed entirely from electropolished 316 stainless steel, PTFE (Teflon®), and Viton® elastomers—materials certified for ultra-trace VOC stability per EPA Method TO-14A and TO-15. Its core function is to enable unattended, multi-hour or multi-day integrated sampling campaigns required for photochemical assessment monitoring stations (PAMS), urban air toxics networks, and regulatory compliance programs under U.S. EPA, EU Air Quality Directive, and ISO 16000-6 frameworks.

Key Features

• Full compliance with U.S. EPA Methods TO-14A and TO-15 for volatile organic compound (VOC) sampling in ambient, indoor, and source emission testing
• Programmable canister switching intervals: user-selectable from 0.5–4 hr (in 0.5-hr increments), or 1–8 hr / 3–24 hr ranges via front-panel DIP switch (SW1) on internal PCB
• Front-panel status interface featuring a 3-inch red LED display indicating active canister position (1–16) and operational mode
• Zero-dead-volume fluidic architecture using 1/8″ stainless steel Swagelok®-compatible fittings and inert fluoropolymer seals
• Environmental resilience: operating temperature range 0–70°C; timebase accuracy ±0.01% across full thermal range
• Modular integration: designed exclusively for use with Xonteck 901 Canister Sampler as master controller—no standalone operation
• Maintenance-optimized design with tool-free access to valve assembly and electrical components; wetted surfaces limited to 316 SS, PTFE, and Viton®

Sample Compatibility & Compliance

The 912 adapter supports standard 6-L, 3.2-L, and 1-L EPA-certified canisters with passivated interiors. Its material compatibility ensures quantitative recovery of C₂–C₁₂ hydrocarbons, halogenated VOCs (e.g., chloromethanes, perchloroethylene), oxygenates (e.g., acetone, MTBE), and sulfur compounds (e.g., H₂S, COS) without adsorption or catalytic degradation. It meets the material and performance requirements of ASTM D5466 (Standard Test Method for Determination of Volatile Organic Compounds in Ambient Air Using Active Sampling Onto Sorbent Tubes and Analysis by Gas Chromatography/Mass Spectrometry), and supports GLP/GMP-aligned audit trails when paired with 901-series data loggers compliant with FDA 21 CFR Part 11 electronic record controls.

Software & Data Management

The 912 itself contains no embedded firmware or software—it functions as a hardware-level peripheral governed entirely by timing and command signals from the Xonteck 901 controller. All sampling event logging, interval configuration, and diagnostic reporting occur within the 901’s onboard microcontroller and are exportable via RS-232 or USB-to-serial interface to Xonteck’s proprietary acquisition software (v4.2+). This software generates timestamped, tamper-evident CSV and XML reports containing canister ID, start/stop times, ambient pressure/temperature (if sensor-equipped), and valve position history—fully traceable for regulatory submissions to EPA AIRS, EEA Eionet, or national environmental agencies.

Applications

• Long-term PAMS network monitoring for ozone precursor speciation (e.g., isoprene, xylenes, ethylbenzene)
• Urban air quality studies requiring diurnal or weekly integrated VOC profiles
• Industrial fence-line monitoring per EPA OTM-33A and EU BREF reference methods
• Calibration verification of online GC-FID/PID systems using canister-collected reference standards
• Indoor air quality assessments in commercial buildings and schools under ISO 16000-6 protocols
• Source apportionment modeling inputs where speciated VOC data at sub-ppbv sensitivity is mandatory

FAQ

Is the 912 compatible with non-Xonteck canister samplers?
No. The 912 requires proprietary TTL-level timing and valve control signals generated only by the Xonteck 901 series. It lacks independent power sequencing or internal clocking.
What is the maximum recommended sample flow rate through the 912?
The adapter is rated for continuous operation at 100–500 mL/min, consistent with EPA TO-15 fill criteria and optimal canister pressurization dynamics.
Does the unit include pressure regulation or flow control?
No. Flow control and inlet pressure regulation must be provided upstream—typically via a calibrated mass flow controller (MFC) or critical orifice bank integrated into the 901 system.
Can the 912 be used for grab sampling?
It is not designed for single-point grab sampling. Its architecture assumes time-integrated, sequential collection across multiple canisters per campaign.
Is NIST-traceable calibration documentation available?
Yes—valve timing accuracy (±0.01%) is verified during factory acceptance testing using a NIST-traceable quartz oscillator standard; calibration certificates are supplied with each unit.