Field Instruments

Product Overview

The REED R4100 is a versatile vane thermo-anemometer designed to measure air velocity, air volume (CFM/CMM), and air temperature simultaneously. Equipped with a dual-display, automatic volume calculation, and a compact handheld design, this instrument is ideal for HVAC technicians, ventilation system specialists, and laboratory environments.

Key Features

• Measures air velocity in multiple units: m/s, fpm, km/h, mph, knots, Beaufort
• Calculates air volume (CFM/CMM) automatically when duct area is entered
• Dual LCD display shows air velocity and temperature simultaneously
• Basic accuracy typically around ±3%
• Built-in memory for up to 99 data points
• Max/Min/Average functions, Data Hold, and low-battery indicator
• Backlit display for indoor low-light use
• Tripod mountable for hands-free monitoring
• Robust, user-friendly design suitable for field and laboratory use

Technical Specifications

Brand: REED Instruments
Model: R4100
Type: Vane Thermo-Anemometer with Air Volume Calculation

Air Velocity

• Range: 0.4 to 30.0 m/s (approx.)
• Equivalent: 200 to 15,733 fpm
• Additional units: km/h, mph, knots, Beaufort
• Accuracy: ±3% of reading (typical)
• Units resolution: 0.01 m/s, 1 fpm, 0.1 km/h, etc.

Air Volume

• Range: 0 to 99,999 CFM/CMM
• Resolution: 0.001 CFM/CMM

Temperature

• Range: −20°C to +60°C (−4°F to 140°F approx.)
• Accuracy: ±1 °C (±1.8°F)
• Resolution: 0.1°C / 0.1°F

General

• Response time: Approx. 1 second
• Display: Dual-LCD, backlit
• Memory: Up to 99 data points
• Tripod mountable: Yes
• Power: 9V battery
• Operating conditions: 5°C to 40°C (approx.)
• Dimensions: Approx. 140 × 65 × 38 mm
• Weight: Approx. 296 g

Included Accessories

• Vane probe (50 mm diameter)
• Hard carrying case
• Batteries
• User manual

Applications

• HVAC system commissioning and balancing
• Duct velocity and volume measurement
• Air change rate measurement in rooms and laboratories
• Cleanroom, filter, and face velocity testing
• Refrigeration/air-conditioning servicing
• Ventilation system performance diagnostics

Why Buy from FieldInstruments.lk?

• Guaranteed genuine REED Instruments product
• Competitive pricing with secure delivery across Sri Lanka
• Technical support and calibration advice locally available
• One-stop source for HVAC test and measurement equipment

The REED R4100 provides reliable, multi-parameter air measurement in a single portable tool—ideal for professionals seeking versatility and accuracy.

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Fieldinstruments.lk
50/3, Angampitiya Rd, Ethul Kotte, Sri Lanka. 10100.
Phone: +94718555888 Email: info@fieldinstruments.lk