Name of the equipment: Portable Laser Aerosol Spectrometer (LAS) Make & Model: Grimm Portable LAS Model: 11-R I-Stem Registration ID- 3220813 Category of Instrument ● Environmental Monitoring ● Aerosol Science Types of Analysis / Testing ● Real-time aerosol particle size distribution & concentration measurement Application: ● Air quality monitoring (ambient conditions of indoor measurements) ● Workplace Exposure assessment ● Pollution source characterization Description of Instrument A portable, high-resolution aerosol spectrometer for real-time particle analysis in environmental and industrial settings.

Book through I-STEM: https://www.istem.gov.in/ Slot Booking Link I-STEM Slot Booking link for External User

Booking available for Internal and External Both Requisition form for Internals Externals

Faculty In-charge: Dr. Anantha Singh T S Dr. Bhaskar S Email ID: singh87@nitc.ac.in bhaskars@nitc.ac.in Phone number: Anantha Singh: +91-8758790511 Bhaskar S: +91-9742720843

Technical Staff: Fashid V C (TA) fashidvc@nitc.ac.in Amardeep KV (Technician) amardipkumarv@nitc.ac.in

Department CED Office Email ID cedoffice@nitc.ac.in Location Environmental Engineering Laboratory, Department of Civil Engineering Lab Phone No 0495 228 6247

Features of the equipment ✔ 31-channel optical particle sizing (0.25 - 32 µm) ✔ Robust, battery-operated design for field use (optional) ✔ Data logging & real-time display	Unique features/Measurement capabilities, if any ⮚ High time resolution (6 sec – 1 hr adjustable) ⮚ Simultaneous PM1, PM2.5, PM10 concentration (number and mass)  measurement
Instrument Technical Description and Major Specifications (This Specifications Limited to Major 5) ▪ Size Range: 0.25 – 32 µm (31 size bins) ▪ Flow Rate: 1.2 L/min (controlled) ▪ Concentration Range: 0 – 2,000,000 particles/L ▪ Data Output: Particle number & mass distribution ▪ Power Supply: 18V DC / Battery operation (8 hrs)	Measurement/Sample specifications: ▪ Sample Type: Airborne particles (aerosols) ▪ Sampling Environment: 0 – 75% RH (non-condensing) ▪ Operating Temp: 0 – 40°C ▪ Calibration: ISO 21501-4 compliant

● Quantity: Continuous real-time sampling (no fixed volume; operates on air flow)

● State: Airborne particulate matter (aerosols)

● Pre-Preparation: None required (direct ambient air intake)

● Compatibility:

o Non-corrosive gases

o Non-condensing conditions (0–75% RH)

o Temperature Range: 0-40 °C

● Before Measurement:

o Perform a zero-check using HEPA-filtered air if high accuracy is required.

o Ensure the inlet is unobstructed and free from debris.

● During Measurement:

o Avoid sampling in fog, rain, direct sunlight or condensation.

o For stack/ducted sampling, use an appropriate dilution system if particle concentration exceeds 2,000,000 particles/L.

● Data Handling:

o The Mini-LAS 11-R can be controlled both directly and remotely. With its comprehensive interface configuration (Bluetooth, USB, LAN, RS232), it is flexible in regards to data transmission and only limited by the maximum cable length or effective range of the wireless connection.

o For long-term monitoring, external power is recommended.

● Safety Notes:

o Do not expose the device to explosive atmospheres.

o Clean the inlet nozzle periodically if used in high-dust environments.

Internal	External Academic Institutes	National R&D Lab	Industry
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