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Product Details
Product Overview
The HM-ZHS2 is an online near-infrared moisture analysis system that measures the moisture content of moving material continuously and without contact. Water molecules absorb near-infrared energy in specific bands, most strongly around 1.45 μm and 1.94 μm; within that spectral range the absorbed energy is proportional to the water content of the material. The instrument selects wavelengths with optical filters, converts the returned infrared light into an electrical signal with a photoelectric detector, and displays the result as a moisture percentage.
Where a surface changes as it passes the measuring point, a single pair of wavelengths can be misled by the colour, texture or packing of the material rather than by its water content. The HM-ZHS2 therefore uses a 7-band, 14-path optical design: seven wavelength bands distributed across the near-infrared region work together and penetrate to different depths, and fourteen optical paths collect more measurement data from the same spot. The result is a configuration built to hold a stable reading on materials with colour variation, dark colour, slight caking, a mottled surface or mixed composition, and in demanding measurement environments.
Results are shown in seconds on the 7-inch Android 10 touch screen and can be uploaded over Wi-Fi or Ethernet to a self-developed cloud data platform provided to users free of charge. The HM-ZHS2 uses the host, probe and interface set of the HM online moisture platform, and is the original model of that series.
Key Features
7-band, 14-path optical design: seven wavelength bands cooperate to penetrate different depths of the material, and fourteen optical paths improve tolerance to complex variation on the surface being measured.
Non-contact, non-destructive measurement: the probe reads the material from a working distance of 250 ± 50 mm, so the moving product is neither touched nor destroyed.
Dual-detector measurement: the main detector and the auxiliary detector compare the infrared signal of every wavelength one by one, so the output signal relates only to the substance being measured and instrument drift is effectively eliminated.
Multiple onboard temperature sensors: secondary compensation for the slight temperature drift of the two detectors, together with monitoring of the whole system so that each component keeps working normally.
Imported high-efficiency halogen light source: high efficiency and long service life, which reduces maintenance cost.
Imported high-detection-efficiency detector: improves the signal-to-noise ratio of the system and makes the data more reliable.
Fast response: the filtering range can be set between 0% and 2.5%, a single measurement takes only seconds, and the result is output quickly, which suits rapid screening of large batches on line.
Android 10 operating system with a 7-inch, 1024 × 600 touch screen: a clear and efficient interface for operation, model work and data review.
User-built quantitative models: users can take representative samples of their own material and build, validate and maintain the calibration model with the built-in software.
Free cloud platform: results can be uploaded over Wi-Fi or Ethernet to a self-developed data management platform that is open to users at no additional cost.
Automatic alarm: low-limit and high-limit alarms with queryable alarm records.
Applications
The instrument is used for online moisture measurement in the following industries:
Food and food processing: starch, flour, protein powder, milk powder, tomato powder, sugar, salt, monosodium glutamate, tea leaves and food additives
Textile: cotton cloth and fabric
Paper: paperboard, paper and packaging paper
Wood: timber, wood boards and sawdust
Building materials and non-metallic minerals: cement, concrete and ore powder
Pharmaceutical: pharmaceutical granules and medicinal powder
Feed: raw granules and various grain and food powders in feed production
Chemical: chemical raw material powders and granules, fertilisers and detergents
Within these industries, the 7-band, 14-path optical design is the configuration intended for products whose surface is not uniform as it passes the measuring point: batches with colour variation, darker materials, slight caking, a mottled surface or a mixed composition.
Technical Specifications
| Measurement parameter | Specification |
|---|---|
| Measurement range | 0% – 60% (depending on the specific material) |
| Measurement accuracy | ±0.1% – ±0.5% (depending on the material) |
| Spot diameter | 60 mm (with the probe 250 mm away from the material) |
| Working distance | 250 ± 50 mm |
| Response time | 1 – 80 s, adjustable |
| Data collection cycle | 1 – 120 min, adjustable |
| Detection channels | 200 |
| Instrument and installation | Specification |
|---|---|
| Light source | Imported high-efficiency halogen light source |
| Detector | Imported high-detection-efficiency detector |
| Probe material | High borosilicate quartz glass |
| Probe sealing grade | IP65 |
| Automatic alarm | Low-limit alarm, high-limit alarm, alarm records queryable |
| Storage capacity | 16 GB, stores 20,000 test results |
| Interface configuration | 1 × 4–20 mA low and high limit alarm interface, 1 set of passive switch output, 1 × RS485 interface for secondary development |
| Power | ≤65 W |
| Probe cantilever fixed seat round tube diameter | 25 mm – 32 mm |
| Probe dimensions | 380 mm × 180 mm × 180 mm |
| Host dimensions | 235 mm × 170 mm × 102 mm |
| Probe weight | 10 kg |
| Host weight | 5 kg |
Standard Configuration
| Item | Quantity | Unit | Specification |
|---|---|---|---|
| Instrument host | 1 | set | — |
| Instrument probe | 1 | piece | — |
| Host-to-probe connection cable | 1 | piece | — |
| Host power cord | 1 | piece | — |
| Instruction manual | 1 | copy | — |
| Certificate of conformity | 1 | piece | — |
| Touch pen | 1 | piece | — |
| Warranty card | 1 | piece | — |
| Short flat-head Allen wrench | 1 | piece | 4 mm, 82308 |
Optional accessories are available for specific installation and protection requirements, including a positive-pressure air purge hood for the light exit aperture, pneumatic fittings and plug connectors. Optional items are not part of the standard configuration.
Model Selection
| Model | Optical configuration | Intended material and working conditions |
|---|---|---|
| HM-ZHS1 | 4 bands, 8 optical paths | Continuous and accurate measurement under normal working conditions, on materials with uniform texture, stable colour, even particle size and small process fluctuation |
| HM-ZHS2 | 7 bands, 14 optical paths | Materials with colour variation, dark colour, slight caking, mottled surface or complex composition, and demanding measurement environments |
Both models share the same host, probe, operating system, interface configuration and 200 detection channels. They differ in the optical design and in the material conditions the optical design is intended for.
Product Enquiries
Contact our sales representative for product enquiries, configuration information and coordination of service requests.
Sales Contact: Arthur
Email: Arthur@hmdzkj.cn
Tel / WhatsApp / WeChat: +86 18353666151
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