Victor Non-Contact Infrared Thermometer – -50°C to 900°C, Adjustable Emissivity, HD Color Screen & Laser Aiming 304D 304E 304F

Three Models Cover Low to Extreme Heat

• The Ruoshui 304 Series offers three dedicated non-contact infrared thermometer models, each optimized for different maximum temperatures:
  • 304D – -50°C to 400°C (-58°F to 752°F) – ideal for HVAC, electrical, and automotive
  • 304E – -50°C to 600°C (-58°F to 1112°F) – for industrial equipment and exhaust systems
  • 304F – -50°C to 900°C (-58°F to 1652°F) – for high-temperature applications like furnaces and kilns
• No matter your industry, there is a non-contact infrared thermometer in this series that matches your exact temperature requirements.

Fast & Accurate – The Name Says It All

• As a true non-contact infrared thermometer, the Ruoshui 304 series delivers ±1.5% reading accuracy from 0°C to 900°C (with ±3°C from -50°C to 0°C).
• 0.1°C / 0.1°F resolution – detect subtle temperature changes like a 0.3°C rise in a bearing or a 0.5°F drop in an air vent.
• Response time: 0.5 seconds (90%) – point, pull the trigger, and get an instant reading.
• Fast and accurate is not just a slogan – it is engineered into every non-contact infrared thermometer in this series.

Adjustable Emissivity (0.1–1) for True Surface Temperature

• Many budget infrared thermometers use a fixed 0.95 emissivity, leading to massive errors on shiny or reflective surfaces.
• The Ruoshui 304 series features fully adjustable emissivity from 0.1 to 1 – a professional feature on a non-contact infrared thermometer at this price point.
• Measure:
  • Shiny metals (low emissivity) – adjust down to 0.1–0.3 for accurate readings
  • Painted/oxidized surfaces (medium emissivity) – 0.8–0.95 range
  • Organic materials, rubber, asphalt (high emissivity) – 0.95–1.0
• Without adjustable emissivity, a non-contact infrared thermometer can be off by 50°C or more on reflective targets – Ruoshui gives you control.

HD Color Screen – Clear Readings in Any Light

• The high-definition color display on this non-contact infrared thermometer is a significant upgrade over basic black-and-white LCDs.
• Crisp, vibrant numbers and icons are readable in bright sunlight or dark mechanical rooms.
• Backlit display ensures you never struggle to read measurements, even in low-light conditions.

Precision Laser Aiming for Target Accuracy

• Built-in laser aiming shows you exactly where the non-contact infrared thermometer is measuring.
• The laser guides your aim to ensure you are measuring the correct component – not adjacent wires, pipes, or background surfaces.
• Essential for crowded electrical panels, dense machinery, or distant targets.

Multiple Professional Functions

• This non-contact infrared thermometer is packed with field-ready features:
  • MAX / MIN – automatically track the highest and lowest temperatures during a scan
  • Data Hold – freeze the reading on the display for recording after pulling away from the target
  • High/Low Temperature Alarm – set audible or visual alerts when thresholds are exceeded
  • Overrange indication – clear "OL" or similar warning when outside measurement range
  • °C/°F unit conversion – one-key switch between Celsius and Fahrenheit

One-Key Measurement & Auto Power-Off

• Simple operation: press the trigger and this non-contact infrared thermometer reads instantly.
• Auto power-off after 7 seconds of no operation – preserves battery life without thinking about it.
• Low battery indication – never get caught with a dead non-contact infrared thermometer during an important job.

Long Battery Life with Standard AAA Batteries

• Powered by two 1.5V AAA batteries – globally available and inexpensive.
• No proprietary rechargeable packs to lose or special chargers to misplace.
• This non-contact infrared thermometer keeps working when specialty tools fail.

Wide Spectral Response (5–14μm)

• Optimized spectral range for general-purpose non-contact temperature measurement.
• Works reliably on a vast array of materials and surface types.
• Cuts through atmospheric interference for accurate readings at distance.

12:1 Distance-to-Spot (D:S) Ratio

• 12:1 field of view allows you to measure a 1-inch target from 12 inches away.
• Suitable for most electrical panels, HVAC vents, bearings, and automotive components.
• Keeps the user at a safe distance from live or hazardous surfaces.

Compact, Ergonomic Design

• Product size: 155 × 92 × 42 mm – fits comfortably in one hand.
• Weight: 180g (including batteries) – light enough for all-day use without fatigue.
• Pistol-grip style natural hand position – this non-contact infrared thermometer feels like an extension of your arm.

Durable Build with Gift Box Packaging

• Rugged construction withstands daily job site use.
• Comes in a gift box with manual and batteries included – ready to use right out of the box.
• Professional appearance for technicians who care about their tools.

Wide Operating & Storage Range

• Working temperature: 0°C to 40°C – reliable in most indoor and outdoor conditions.
• Storage temperature: -10°C to 60°C – leave this non-contact infrared thermometer in your truck or toolbox without worry.

Applications Across Many Trades

This non-contact infrared thermometer serves professionals in:

Industry	Typical Use
HVAC/R	Supply/return air, compressor discharge, superheat measurement
Electrical	Breaker temps, loose connections, transformer hotspots
Automotive	Exhaust manifolds, brakes, engine diagnostics, AC vents
Industrial maintenance	Bearings, motors, conveyor rollers, insulation integrity
Food safety	Cooking surfaces, storage temps, cold chain verification
Building inspection	Air leaks, moisture detection, insulation voids
Fire safety	Hot spot detection, rekindle investigation
Home DIY	Appliance diagnostics, draft checking, cooking