Par Meter and Spectrometer

Mammoth M400 PAR Meter & Spectrometer

We worked closely with our suppliers to bring you the M400 PAR Meter and Spectrometer — a cutting-edge tool engineered for precision, stability, and performance. Built with a high-speed CPU and a high-precision CCD optical sensor, it uses a long focal cross asymmetric CT spectroscopy system to deliver results that rival lab-grade instruments. 

380nm - 780nm Accuracy withing 5% of Apogee and $2000+ lab ppfd meters.  

Most PAR meters cost $500+ for basic PPFD readings only. The M400 gives you full spectral analysis at a fraction of the price.

💻 Data Export Option: You can download spectral data using our beta software (3rd-party developing). Please Note: functionality is limited, may not work on all computers, and support is not currently available as it is 3rd party Beta right now.  Click here

Key Features

1. Advanced Optical Technology

   • 2nm optical resolution for precise measurements

   • Wide wavelength range (380–780nm) for complete spectral coverage

   • Stable, consistent performance

2. Electronic Shutter System

   • Minimum integration time: 50 μs

   • Detects both strong and weak optical signals

   • Adjustable integration for versatility

3. Portable, Durable Design

   • Lightweight, all-aluminum alloy body

   • Modern, compact form factor

4. Open Operating System

   • Upgraded OS with source code access

   • Unlimited upgrade potential

5. Intuitive Interface

   • 3.5" HD IPS capacitive touchscreen

   • Realistic graphics, smooth operation

   • User-friendly display and navigation

6. Convenience + Power

   • Quick on/off and one-click testing

   • 24-hour battery life for extended use

Function Capabilities

• PPFD PAR: Photosynthetic Photon Flux Density measurement

• Spectral Distribution Map: Full spectral profile

• Color Temperature (Tc K): Accurate lighting analysis

• Illuminance (E lx): Lux measurement

• Irradiance (Ee W/m²): Light intensity

• Chromaticity Coordinates (x,y)

• Relative Spectral Power Distribution P(λ)

• CRI (Ra, Ri 1–15): Full-spectrum color rendering accuracy

• Chromaticity & Color Tolerance Maps

• Wavelength Data: Main, peak, half width

• Color Ratios: Purity, red, green, blue analysis

• Export Capability: Per-nanometer spectral data

Technical Specifications

• Model: M400 Spectral Color Illuminometer

• Wavelength Range: 380–780nm

• System: Long focal cross asymmetric CT split beam

• Sensor: High-precision CCD

• Spectral Bandwidth: 2nm (FWHM)

• Resolution: 0.2nm

• Wavelength Accuracy: ±0.5nm

• x,y Accuracy: ±0.0015 (±0.0005 repeatability)

• Illuminance Range: 0.1 lux – 2,000 Klux

• CRI Accuracy: ±1.5%

• Screen: 3.5" IPS HD touch display

• Color Temp Range: 1,000K – 100,000K

• Battery Life: 24 hours continuous testing

🔬 Whether you’re a professional grower, researcher, or lighting enthusiast, the M400 PAR Meter & Spectrometer redefines accuracy, portability, and value. It’s the future of cannabis lighting measurement — at a price that makes sense.