Thermo Scientific 146i-GO Portable Dynamic Gas Calibrator

Overview

The Thermo Scientific 146i-GO is a portable, dynamic gas calibrator engineered for high-precision field calibration of ambient air quality monitors, continuous emission monitoring systems (CEMS), gas chromatographs, and laboratory analyzers. It operates on the principle of gravimetrically traceable, mass-flow-controlled dilution—using certified primary standard gases and precision thermal mass flow controllers—to generate stable, accurate, and repeatable calibration gas mixtures across a wide concentration range. Unlike static permeation or diffusion-based calibrators, the 146i-GO delivers true dynamic calibration with real-time flow feedback and closed-loop pressure compensation, enabling direct in-line calibration under pressurized conditions up to 50 psi—critical for validating CEMS installations without system shutdown or bypass.

Key Features

• Full-system CEMS calibration capability: Supports pressurized (up to 50 psi), in-situ calibration of extractive and in-situ CEMS configurations—compliant with EPA Method 205 and EN 15267 requirements for performance verification.
• Ultra-fast thermal stabilization: Achieves metrological readiness in ≤2 minutes, minimizing downtime during field audits and routine QA/QC checks.
• Wide dilution range: Programmable dilution ratios from 1:1 to 1:2000, supporting sub-ppb to high-ppm calibration standards for SO₂, NO, NO₂, CO, CH₄, and NMHCs using single- or multi-gas cylinders.
• Intelligent flow control architecture: Dual-stage mass flow control with active temperature and pressure compensation ensures ±0.5% accuracy across 10–100% of full-scale output—validated per ISO/IEC 17025-accredited procedures.
• Ruggedized field design: IP65-rated enclosure with shock-absorbing elastomeric overmolding, MIL-STD-810G compliant for vibration, drop, and dust exposure—engineered for refinery, power plant, and remote monitoring site deployment.
• Unified operator interface: Single-touchscreen HMI with context-aware workflow guidance, real-time gas concentration preview, and automated error prevention (e.g., out-of-range dilution alerts, cylinder pressure validation).
• Flexible power architecture: Simultaneous support for 100–240 VAC, 12–24 VDC, and internal Li-ion battery (>10 h continuous operation)—enabling uninterrupted use in mobile labs, rooftops, stack platforms, and off-grid locations.

Sample Compatibility & Compliance

The 146i-GO is compatible with standard CGA-600 and CGA-660 gas cylinder connections and supports both single-component and pre-mixed certified reference materials (CRMs) traceable to NIST, BAM, or LNE standards. It meets regulatory requirements for ambient air monitoring (US EPA 40 CFR Part 58 Appendix A, EU Directive 2008/50/EC), CEMS performance evaluation (EPA Performance Specification 2, EN 14181), and laboratory quality systems (ISO/IEC 17025:2017, GLP). Its firmware includes audit-trail logging and electronic signature support aligned with FDA 21 CFR Part 11 for regulated environments requiring data integrity.

Software & Data Management

Calibration protocols, instrument logs, and certificate generation are managed via Thermo Scientific CalManager™ desktop software (Windows-compatible), which exports PDF calibration certificates with full traceability metadata—including cylinder lot numbers, flow controller calibration dates, environmental conditions, and uncertainty budgets. Field operations are supported through the CalGo™ mobile app (iOS/Android), enabling remote configuration, real-time telemetry, and secure cloud sync via encrypted Wi-Fi or Bluetooth. All data records include timestamped operator ID, GPS location tagging (optional), and tamper-evident digital signatures.

Applications

• Ambient Air Quality Monitoring Stations (AQMS): On-site zero/span verification, linear range validation, and inter-comparison studies per US EPA QA Handbook Volume II.
• CEMS Compliance Audits: Full-path calibration of extractive systems—including sample probe, heated line, and analyzer—under operational pressure and temperature conditions.
• Gas Chromatography (GC) and FTIR Systems: Precise carrier gas blending, standard addition, and method validation for VOC, TO-14A, and EPA Method 18 applications.
• Mobile Emission Testing: Calibration of roadside and vehicle-mounted analyzers used in I/M programs and fleet emissions characterization.
• Research & Method Development: Generation of custom gas mixtures for sensor response testing, kinetic studies, and atmospheric chemistry modeling.

FAQ

What regulatory standards does the 146i-GO support for CEMS calibration?

It complies with EPA PS-2, EN 14181, and ISO 12039 for dynamic calibration under pressurized conditions—supporting both relative accuracy test audits (RATA) and ongoing quality assurance.
Can the 146i-GO be used with non-Thermo analyzers?

Yes—it is vendor-neutral and interfaces with any gas analyzer accepting standard analog (4–20 mA) or digital (RS-232/Modbus) input signals.
Is battery runtime affected by flow rate or pressure?

Runtime remains ≥10 hours across all flow options (S/M) and pressures up to 50 psi; power consumption is dynamically optimized via adaptive controller duty cycling.
How is calibration traceability maintained?

Each unit ships with a NIST-traceable calibration certificate covering all mass flow controllers and pressure sensors, with annual recalibration intervals recommended per ISO/IEC 17025 guidelines.
Does the 146i-GO support automated sequence programming?

Yes—users can define multi-step calibration routines (e.g., zero → span → linearity check) with programmable dwell times, concentration ramps, and pass/fail thresholds—all executed unattended.