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Product Overview
HM-ST1 is a portable nondestructive apple sugar meter based on near-infrared spectroscopy. It estimates apple sugar content in Brix from reflected optical signals and a built-in calibration model, providing a result in less than three seconds without cutting the fruit. It supports on-site apple intake checks, grading and retail quality checks where the sampled fruit needs to remain intact.
Near-infrared light interacts with organic molecules inside the apple, including O–H and C–H groups. The optical sensor captures the returned spectral signal, and the instrument compares its absorption features with the apple sugar calibration model to calculate a Brix estimate.
Key Features
- Android operating system and a 3.5-inch color touchscreen.
- Automatic temperature compensation from 5 to 35 °C.
- Results in less than three seconds, with automatic averaging of measurements taken at multiple points.
- Open calibration supports checking and adjustment against a reference refractometer.
- Local records can be reviewed, exported and uploaded through Wi-Fi. Sample numbers are generated automatically.
- Built-in rechargeable lithium battery, Type-C charging and an IP64-rated housing.
Applications
- Orchard monitoring of apple sugar content before harvest and during staged picking.
- Sampling at apple purchasing points, cooperatives and wholesale receiving areas.
- Sugar-content checks during apple grading, packing and retail display.
- Apple variety selection, cultivation trials and storage research.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | HM-ST1 |
| Sample | Apple |
| Measurement principle | Near-infrared spectroscopy with an apple calibration model |
| Detection time | <3 s |
| Brix measurement range | 10.0–18.0% Brix at a sample temperature of 5–35 °C |
| Brix resolution | 0.1% Brix |
| Temperature resolution | 0.1 °C |
| Brix accuracy | ±1% Brix |
| Temperature accuracy | ±1 °C |
| Brix repeatability | ±0.5% Brix |
| Temperature compensation | 5–35 °C |
| Operating temperature | 5–35 °C |
| Display | 3.5-inch color touchscreen |
| Communication and charging | Wi-Fi; Type-C USB |
| Data handling | Local storage, record search, export and upload |
| Battery | 4400 mAh, 3.7 V built-in lithium battery |
| Protection rating | IP64 |
| Dimensions | 171 × 78 × 56 mm |
| Weight | Approximately 380 g |
Apple variety and the measurement environment can affect accuracy. The stated Brix range applies at a sample temperature of 5–35 °C.
Configuration
The instrument includes three replaceable foam measurement pads and a built-in rechargeable battery.
Operation and Support
Place the measurement opening against the apple surface and start the test from the touchscreen. Use multiple measurement points when an averaged result is needed. Review the saved record, then export it or upload it through Wi-Fi. Use the open calibration function to check readings against a reference refractometer.
Product Enquiries
Tell our sales representative your apple varieties, testing environment and sampling workflow to discuss the instrument and its calibration settings.
Sales Contact: Kyra
Email: Kyra@hmdzkj.cn
Tel / WhatsApp / WeChat: +86 13792642016
Article address:https://www.hmfoodtesting.com/apple-sugar-meter/hm-st1-nondestructive-apple-sugar-meter.html
