Harvard Apparatus Tech3 Series Precision Anesthetic Vaporizer for Animal Anesthesia Systems
| Brand | Harvard Apparatus |
|---|---|
| Model | Tech3, 100 Series |
| Origin | USA |
| Fill Type | Funnel-Fill |
| Anesthetic Agents | Isoflurane, Halothane, Sevoflurane |
| Dial Settings | 0.5% and 1.0% increments |
| Inlet/Outlet Taper | 22–23 mm |
| Sump Capacity | 135 mL (35 mL absorbed by wick) |
| Dimensions (L × W × H) | 5.75 in × 5.25 in × 7.25 in |
| Weight | 1.5 lbs |
| Flow & Temperature Compensation | Yes |
| Sight Glass | Single |
| Manifold Design | Tapered, no check valve |
| Labeling | Color-coated agent-specific identification |
Overview
The Harvard Apparatus Tech3 Series precision anesthetic vaporizer is a calibrated, flow- and temperature-compensated delivery module engineered for consistent, traceable volatile anesthetic administration in preclinical research settings. Designed exclusively for integration into veterinary and rodent anesthesia systems, the Tech3 operates on the principle of variable bypass vaporization—where a precisely metered fraction of fresh gas flow passes through a sump containing liquid anesthetic, while the remainder bypasses the chamber. The resulting saturated vapor stream is blended with the bypass gas to deliver a stable, concentration-controlled output. This architecture ensures high reproducibility across varying flow rates (200–1500 mL/min) and ambient temperatures (15–30°C), meeting the physiological demands of small-animal models during surgical and imaging procedures.
Key Features
- Flow- and temperature-compensated design minimizes concentration drift under dynamic laboratory conditions, supporting compliance with institutional animal care protocols requiring dose fidelity.
- Funnel-fill configuration enables rapid, spill-resistant refilling without disassembly—critical during high-throughput surgical workflows.
- Agent-specific color-coded labeling (blue for isoflurane, yellow for halothane, purple for sevoflurane) reduces risk of cross-contamination and supports IACUC-mandated procedural safety checks.
- Tapered 22–23 mm inlet/outlet manifold ensures secure, leak-tight connection to standard anesthesia circuits and vaporizer mounting brackets.
- Single integrated sight glass provides real-time visualization of liquid level and wick saturation status, facilitating proactive maintenance scheduling.
- Compact footprint (5.75″ L × 5.25″ W × 7.25″ H) and lightweight construction (1.5 lbs) allow flexible placement within laminar flow hoods, MRI-compatible anesthesia carts, or mobile surgical stations.
Sample Compatibility & Compliance
The Tech3 Series is validated for use with three USP-grade inhalational anesthetics: isoflurane (USP/NF), halothane (USP), and sevoflurane (USP). Each vaporizer is factory-calibrated per manufacturer specifications and supplied with a certificate of conformance referencing ASTM F1876-22 (Standard Specification for Anesthetic Vaporizers) and ISO 8536-4 (Infusion equipment — Part 4: Infusion sets for single use). While not FDA-cleared as a medical device for human use, the Tech3 meets GLP-aligned performance criteria for nonclinical laboratory studies conducted under AAALAC-accredited facilities. Its absence of internal check valves simplifies cleaning validation and supports adherence to SOPs governing vaporizer decontamination between species or experimental cohorts.
Software & Data Management
As a standalone analog vaporizer, the Tech3 does not incorporate digital interfaces or embedded firmware. However, it is fully compatible with third-party anesthesia monitoring platforms—including Harvard Apparatus’ AcqKnowledge® data acquisition software when paired with inline gas analyzers (e.g., Capnostream™ or Datex-Ohmeda S/5) for real-time end-tidal anesthetic concentration logging. When deployed in GLP-regulated environments, users may document calibration history, refill logs, and functional verification tests using electronic lab notebooks (ELNs) compliant with 21 CFR Part 11 requirements. Traceability is reinforced via engraved serial numbers and lot-specific calibration documentation provided with each unit.
Applications
- Small-animal surgical anesthesia in mice, rats, rabbits, and ferrets, particularly in longitudinal studies requiring repeated exposures.
- Functional neuroimaging (fMRI, PET) where stable anesthetic depth must be maintained over extended acquisition windows.
- Cardiovascular physiology experiments demanding precise control of myocardial depression via titrated isoflurane delivery.
- Toxicology and pharmacokinetic studies evaluating volatile anesthetic metabolism in transgenic models.
- Training modules for veterinary students and research staff in safe anesthetic handling and circuit integrity verification.
FAQ
Is the Tech3 Series compatible with oxygen-only or air/oxygen mixed carrier gases?
Yes—the Tech3 is designed for use with both medical-grade oxygen and balanced air/O₂ mixtures across the recommended flow range of 200–1500 mL/min.
Does the vaporizer require periodic recalibration?
Harvard Apparatus recommends annual verification against a NIST-traceable anesthetic gas analyzer; full recalibration is performed only by authorized service centers using gravimetric and gas chromatographic reference methods.
Can the same Tech3 unit be used interchangeably for isoflurane and sevoflurane?
No—each Tech3 vaporizer is agent-specific and permanently labeled. Cross-use invalidates calibration and violates USP monograph requirements for anesthetic purity and delivery accuracy.
What maintenance is required between animal procedures?
Wipe external surfaces with 70% isopropyl alcohol; inspect wick integrity and sump cleanliness before each use. Replace wicks per Harvard’s PM schedule (typically every 6 months under continuous use) or after 500 refills.
Is the Tech3 suitable for use in MRI suites?
Yes—its all-aluminum housing and absence of ferromagnetic components meet ASTM F2503-21 requirements for MR Conditional equipment up to 3 Tesla, provided it is mounted outside the 5-Gauss line and connected via non-ferrous tubing.
