Lifemed LM-HF-100 High Flow Oxygen Flow Meter
The Lifemed LM-HF-100 is a durable, high-flow oxygen flow meter providing accurate measurement from 0–70 LPM with ±2% precision using Thorpe tube design. Ideal for hospital bedsides, ICUs, and home oxygen setups, it features brass construction, needle valve control, DISS inlet/outlet, humidity bottle compatibility, and 50 PSI pressure rating for reliable, high-volume gas flow regulation.
Description
Design and Protection Mechanism: Wall-Mounted Thorpe Tube Configuration The Lifemed LM-HF-100 is a robust, wall-mountable high-flow oxygen flow meter engineered for precise regulation of medical gas delivery in clinical environments, including ICUs, respiratory wards, emergency rooms, and home care for patients requiring supplemental oxygen therapy. Constructed from high-polish brass with a clear acrylic tube for visibility, it resists corrosion and withstands daily sterilization, featuring a chrome-plated body for easy cleaning. The compact, low-profile design (150 × 50 × 200 mm) mounts securely via back bracket, with knurled knob for gloved operation and a shatter-resistant tube to prevent breakage. Safety features include over-pressure relief (up to 100 PSI burst) and a tamper-proof flow lock, ensuring compliance with ISO 15002 and NFPA 99 standards for medical gas pipeline systems.
Performance and Flow Measurement: Utilizes a Thorpe tube with a precision black glass float ball for accurate flow indication from 0–70 LPM, calibrated at 50 PSI inlet pressure with ±2% full-scale accuracy across the range. The dual-scale marking allows seamless transitions from low (0–15 LPM) to high flows without multiple units, while the needle valve provides fine adjustments (±0.5 LPM resolution) for titrated therapy. Response time <1 second ensures real-time feedback during patient adjustments, supporting high-flow nasal cannula (HFNC) up to 60 LPM with FiO2 21–100%, ideal for acute respiratory distress or post-extubation support.
Flow Range and Compatibility: Offers extended linearity for high-flow applications (up to 70 LPM), compatible with oxygen concentrators, tanks, or wall outlets via standard DISS male inlet (CGA 1240) and female outlet for humidifiers or masks. The integrated humidification port accommodates 500 mL bottles, preventing dry air delivery, while the vertical orientation minimizes parallax errors for accurate readings. Supports air/oxygen blending when paired with regulators, with color-coded green body per ISO 32 for oxygen identification.
User Interface and Operational Features: Features a large, illuminated dial (optional LED backlight) for low-light visibility, with engraved LPM graduations and a flow-stop knob to zero the needle without disconnection. The ergonomic valve handle rotates 360° for precise control, and multilingual labeling (English, Spanish, Chinese) aids global use. Includes a quick-disconnect swivel for easy tube replacement, and the optional digital readout module logs flow trends for 24 hours via USB.
Sterilization and Maintenance: The acrylic tube detaches for soaking in 2% glutaraldehyde or autoclaving (121°C, 15 min), while the brass body wipes with 70% isopropyl alcohol. The float ball requires no lubrication, and annual calibration via certified lab verifies accuracy (±1% drift tolerance). Tool-free disassembly takes <2 minutes, with replaceable O-rings every 6 months; low-maintenance design minimizes downtime, backed by a 5-year warranty on the valve assembly.
Electrical and Environmental Specifications: No electrical components—passive mechanical operation with passive pressure gauge (0–100 PSI). Rated for 10–50°C ambient temperatures and 0–95% RH (non-condensing), it withstands vibrations up to 5G for transport. The non-ferrous construction avoids magnetic interference, and the compact profile fits standard wall rails without protruding.
Dimensions and Portability: Wall-mount unit: 150 × 50 × 200 mm (H × W × D) weighs 0.8 kg, with optional tabletop bracket for flexibility. The vertical orientation requires 250 mm height clearance, and the quick-connect fittings enable installation in <5 minutes.
- Throughput and Workflow: Regulates continuous flows for 50+ patients daily in multi-bed units, with <10-second adjustments.
- Detection and Monitoring: Thorpe tube float with dual-scale; optional digital logger for 24-hour trends.
- Detection Principle: Variable-area orifice with glass float for pressure-compensated flow indication.
- Additional Features: Humidity bottle adapter; swivel disconnect; color-coded per ISO 32.
- Data Storage: None standard; optional module stores 7-day logs via USB.
- Application Modes: HFNC, ventilator blending, home oxygen; compatible with masks/cannulas.
