Handheld Raman Spectrometer

Product Overview

The HM Instruments HM-SLM Handheld Raman Spectrometer is a portable miniature confocal Raman instrument designed for rapid, non-destructive and highly sensitive material identification. Based on the Raman scattering principle, it uses a 785 nm laser to excite molecular vibrational and rotational transitions in a sample and reads the resulting fingerprint spectrum to identify a substance without opening its container.

Weighing approximately 750 g including the battery and rated IP67 for dust and water resistance, the HM-SLM is built to move between the laboratory bench, the warehouse and the field. Its confocal optical design, high-sensitivity detector and 785 nm excitation work together to suppress fluorescence interference, while an on-board standard spectral library and a user-expandable library cover routine identification tasks across a broad range of materials.

Key Features

• Handheld and field-ready: The main unit weighs about 750 g with the battery and measures 195 × 99 × 35 mm, with IP67 dust and water protection and a 5.5-inch HD touchscreen, so it can be carried to the sample rather than bringing the sample to the instrument.
• 785 nm fluorescence suppression: 785 ± 0.5 nm excitation with a linewidth below 0.08 nm, combined with a high-sensitivity detector and an optimized confocal optical path, reduces interference from high-fluorescence samples and improves identification reliability.
• Fast, non-destructive testing: One-button operation collects a spectrum at the standard 500 ms integration time and typically returns a matched result within about 15 seconds. Samples can often be measured through glass, plastic bags and beverage bottles without contact or opening.
• Explosion-proof certified: The instrument holds CQC explosion-proof certification with the marking Ex ib op is IIB T4 Gb and Ex ib op is IIIB T130℃ Db, in compliance with GB/T 3836.1-2021, GB/T 3836.4-2021 and GB/T 3836.22-2023.
• On-board spectral library: The built-in library covers chemical drugs, explosives and precursors, precursor chemicals for drug and explosive production, toxic and harmful substances, anesthetics, chemical reagents, pesticides and infrequently used chemicals, and supports search and rapid positioning of characteristic peaks.
• User-expandable library: Operators can add reference spectra for their own materials. When signed in to a network account, new library entries are saved to both the local and the cloud user library and can be reviewed and promoted to the standard library by an administrator.
• Cloud architecture and private deployment: A cloud service supports wireless upload of measurement data for short- and long-term analysis, cloud-based model updates, and cloud data search and identification. For sites that need to keep data on their own infrastructure, the platform can be deployed privately with the existing database supplied.
• Smart interaction and data handling: An Android 12 platform, integrated GPS positioning, a 13-megapixel camera, PDF and Excel report export, online database update and audit tracking support traceable field records.
• Real-time safety alert: When prohibited substances such as drugs are detected, the instrument issues a red dangerous-goods alarm prompt on screen.

Applications

The HM-SLM is intended for on-site rapid testing and is used across the following fields:

• Public security and anti-drug work: rapid field identification of suspected substances and precursors, supported by the built-in library and the real-time alert function.
• Food safety: rapid screening and identification of food and agricultural materials where a non-destructive check is preferred.
• Chemicals detection: rapid identification of chemical substances and reagents where a portable, non-destructive check is required.
• Pharmaceutical raw material identification: incoming material identity checks that can often be performed through transparent or semi-transparent packaging.
• Jewelry testing: non-destructive identification of gemstones and related materials.
• Industrial material analysis: incoming and process material identification where a portable instrument is required.

Method boundaries: Raman identification works well for crystalline organic solids, many solvents and materials with strong, well-defined vibrational modes. It is less effective with highly fluorescent samples, dark or strongly absorbing materials, and very dilute aqueous solutions where the analyte signal is weak relative to water. Packaging also affects measurement: thin transparent plastic bags and clear glass vials usually permit measurement through the container, while thick amber glass, opaque drums and metallised foil do not.

Technical Specifications

Parameter	Specification
Model	HM-SLM
Analytical principle	Raman scattering; miniature confocal design
Spectral range	200 - 3800 cm⁻¹ (790 - 1100 nm)
Spectral resolution	5 cm⁻¹ (micro confocal design)
Excitation wavelength	785 ± 0.5 nm, linewidth < 0.08 nm
Laser power	0 - 500 mW, software adjustable (in accordance with the laser product safety requirements of GB 7247.1-2012)
Integration time	1 ms - 10 s, software adjustable; 500 ms typical
Spectral matching	Cosine similarity algorithm; default matching threshold 0.92
Display	5.5-inch HD touchscreen
Camera	13 megapixels
Positioning	Integrated GPS
Operating system	Android 12
Storage	2 + 16 GB (optional 8 + 32 GB)
Data handling	PDF and Excel report export, online database update, user self-built library, audit tracking
Communication interface	Type-C, Bluetooth, Wi-Fi, 4G (optional)
Protection rating	IP67
Explosion-proof marking	Ex ib op is IIB T4 Gb; Ex ib op is IIIB T130℃ Db
Applied standards	GB/T 3836.1-2021; GB/T 3836.4-2021; GB/T 3836.22-2023
Calibration specification	JJF 1544-2024 Calibration Specification for Raman Spectrometers
Operating temperature	0 - 50 ℃
Operating humidity	5% - 80%
Power supply	5 V / 2 A adapter
Battery	7.4 V / 3.5 Ah; 4 - 6 hours endurance
Dimensions	195 mm × 99 mm × 35 mm
Weight	750 g (including battery)

Configuration / Accessories

The HM-SLM is supplied as a complete field kit. The standard shipment includes:

• HM-SLM handheld Raman spectrometer main unit × 1
• Solid powder / solid sample auxiliary detection head × 1
• Liquid assisted detection pool × 1
• Sample bottles, 2 ml liquid chromatography injection vials × 10
• Power adapter (5 V / 2 A) × 1
• Type-C data cable × 1
• Plastic carrying case × 1
• Instruction manual × 1, certificate of conformity × 1 and warranty card × 1

Operation and Support

Routine use follows a simple sequence, and operators should be trained on the working principle, parameters and laser safety rules before first use:

1. Charge the instrument with the supplied adapter (about 4 hours) and hold the power button for three seconds to start it.
2. For solids such as tablets or plastics, fit the probe cap and press its narrow end against the sample surface. For powders, transfer about 0.5 ml or more into a quartz vial and contact the probe with the top of the powder heap. For liquids, use the liquid assisted detection pool with a quartz vial.
3. Press the acquisition key to collect the spectrum; for dark or flammable samples, start at low laser power to avoid damaging the sample.
4. Review the match result, then export a report or save the record. Reports can include GPS information and a site photograph, and records can be exported via the data cable or uploaded to the platform.

Routine settings and maintenance: The default matching threshold of 0.92 is normally appropriate; laser intensity is typically set around 80 for routine measurement. If a glass-packaged sample shows strong fluorescence and a weak signal, the glass wall may be too thick and a quartz container should be used instead. Keep the instrument away from strong electromagnetic interference if spectra occasionally appear abnormal. The instrument should not be disassembled; contact the supplier for service, and keep the warranty card.

FAQ

Product Enquiries

Contact our sales representative for product enquiries, configuration information and coordination of service requests.

Sales Contact: Grace
Email: graceliu@hmdzkj.cn
Tel / WhatsApp / WeChat: +86 17853698681

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