ENTECH CS1200E Time-Integrated Passive Canister Sampler

Overview

The ENTECH CS1200E Time-Integrated Passive Canister Sampler is an engineered solution for quantitative, time-weighted average (TWA) measurement of volatile organic compounds (VOCs) in ambient air. Unlike active pump-based systems, the CS1200E operates on passive, pressure-driven flow principles—leveraging a precisely calibrated sapphire orifice and high-stability pressure regulator to maintain constant mass flow across variable environmental conditions. It delivers consistent, reproducible sampling at near-ambient pressure (typically ±50 mbar of atmospheric), eliminating vacuum-induced adsorption artifacts and enabling direct compatibility with standard SUMMA®-type electropolished stainless steel canisters. The device is fundamentally designed for regulatory-grade compliance sampling where accuracy, traceability, and surface inertness are non-negotiable—particularly in ambient air monitoring networks, industrial fence-line studies, and indoor air quality (IAQ) investigations requiring adherence to U.S. EPA Method TO-15 and ISO 16017-1.

Key Features

• Passive, pressure-regulated flow architecture ensures stable, temperature- and barometric-pressure-insensitive sampling over extended durations (1 h to 168 h).
• Interchangeable sapphire orifices—each individually calibrated—enable precise selection of flow rate and sampling duration without recalibration; standard configurations support 1 h, 3 h, 8 h, 24 h, and 7-day integrations.
• Electropolished 316 stainless steel body with optional Silonite™ fused-silica coating (denoted by “S” in part number) provides ultra-low VOC adsorption and resistance to reactive species including sulfur compounds and aldehydes.
• Integrated McDaniel Controls precision flow meter offers NIST-traceable calibration with documented uncertainty < ±2.0% of reading, supporting audit-ready data integrity.
• Hydrophobic inlet cap filters particulates while preventing moisture ingress—critical for maintaining orifice integrity and avoiding condensation-related flow deviation during transport or field deployment.
• Zero-Teflon® design eliminates fluoropolymer outgassing and analyte adsorption at sealing interfaces; all wetted surfaces are metal-to-metal or fused-silica sealed.

Sample Compatibility & Compliance

The CS1200E is validated for use with standard 6-L and 1-L SUMMA®-treated stainless steel canisters, as well as alternative passivated canisters meeting ASTM D5466 specifications. Its passive flow profile ensures representative integration of VOCs without fractionation bias associated with high-velocity or turbulent sampling. The system conforms to U.S. EPA Compendium Method TO-14A (for ambient VOCs), TO-15 (for target compound quantitation), and ASTM D5466-22 (“Standard Practice for Determination of Volatile Organic Compounds in Ambient Air Using Active or Passive Sampling”). It supports GLP-compliant workflows through documented calibration certificates, lot-specific orifice certification, and full chain-of-custody compatibility. When deployed with Silonite™-coated units, it meets stringent requirements for speciated carbonyl and reduced sulfur compound analysis per EPA Method TO-11A and ISO 16017-1 Annex B.

Software & Data Management

While the CS1200E is a hardware-only passive sampler with no embedded electronics or firmware, its operational documentation and calibration metadata integrate seamlessly into laboratory information management systems (LIMS) and electronic lab notebooks (ELN). Each unit ships with a Certificate of Conformance listing orifice ID, nominal flow rate, calibration date, pressure regulator setpoint, and NIST-traceable verification data. ENTECH provides standardized Excel-based sampling log templates aligned with EPA QA/G-5 and ISO/IEC 17025 reporting requirements—including fields for barometric pressure logging, canister lot tracking, field blank assignment, and analyst signature. For laboratories operating under FDA 21 CFR Part 11 or EU Annex 11, the physical calibration records and orifice traceability documentation serve as auditable evidence of instrument suitability and measurement assurance.

Applications

• Ambient air monitoring networks (e.g., NCore, CASTNet, and regional air quality planning programs)
• Industrial hygiene assessments for workplace TWA exposure estimation per OSHA and ACGIH guidelines
• Fence-line monitoring for fugitive VOC emissions from petrochemical, pharmaceutical, and semiconductor facilities
• Indoor air quality studies targeting formaldehyde, benzene, toluene, xylenes (BTX), and chlorinated solvents
• Method validation and reference sampling in inter-laboratory comparison exercises (e.g., NIST SRM-based round robins)
• Long-term trend analysis where low-maintenance, battery-free, and weather-resistant operation is essential

FAQ

How does the CS1200E achieve constant flow without a pump?

It uses a fixed sapphire orifice combined with a high-stability pressure regulator to maintain laminar, pressure-driven flow—ensuring mass flow remains invariant across typical ambient temperature (−20 °C to 50 °C) and barometric pressure (80–106 kPa) ranges.
Is the CS1200E compatible with GC-MS analysis per EPA TO-15?

Yes—when used with properly certified SUMMA® canisters and following prescribed sampling, shipping, and analytical hold-time protocols outlined in TO-15, the CS1200E delivers data suitable for regulatory submission.
What does the “S” suffix in the part number indicate?

It denotes Silonite™-coated internal surfaces, providing enhanced inertness for reactive VOCs such as hydrogen sulfide, methyl mercaptan, acetaldehyde, and formaldehyde.
Can I reuse the same sapphire orifice for different canister volumes?

No—each sapphire orifice is calibrated for a specific canister volume and target sampling duration; interchange requires matching orifice part number to canister capacity and desired integration time.
Does the CS1200E require periodic recalibration?

The sapphire orifice itself is a passive, drift-free component; however, ENTECH recommends annual verification of the integrated McDaniel flow meter against NIST-traceable standards as part of routine instrument qualification.