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Product DetailsProduct Introduction
The HM-SNH-2 is a dedicated single-parameter handheld ammonia nitrogen detector positioned as the most affordable entry point in the HM Instruments portable water quality testing lineup. Priced at just $440, it provides professional-grade NH3-N measurement using both Nessler reagent and salicylic acid methods, giving operators flexibility to select the optimal approach based on sample matrix and interference conditions. The instrument complies with HJ535-2009 and employs spectrophotometric detection with an imported cold light source and 0.001 absorbance sensitivity. Unlike multi-parameter models, the HM-SNH-2 focuses exclusively on ammonia nitrogen, making it the ideal choice for laboratories, treatment plants, and field teams that require only NH3-N data without paying for additional parameters they do not need. Its direct colorimetric measurement approach eliminates the digestion step entirely, enabling rapid on-site results within minutes. Weighing only 325 grams with 8-hour battery life, it delivers true portability for nutrient discharge compliance monitoring.
Applications
Nutrient discharge compliance monitoring for wastewater treatment plants
Aquaculture water quality ammonia nitrogen assessment
Agricultural runoff and fertilizer contamination screening
Nitrification process monitoring in biological wastewater treatment
River and lake ammonia nitrogen pollution survey
Food and beverage processing wastewater NH3-N testing
Functional Performance
Dual ammonia nitrogen methods (Nessler and salicylic acid) for measurement flexibility across sample types.
Imported cold light source with stable optical performance and up to 100,000 hours lifespan.
Automatic wavelength selection for instant method switching between Nessler and salicylic acid.
0.001 absorbance resolution ensuring precise low-concentration NH3-N detection.
Android smart operating system with intuitive 3.5-inch color LCD touch screen.
Direct colorimetric measurement without digestion step for rapid on-site results.
80,000+ record onboard data storage for long-term nutrient monitoring campaigns.
Type-C, WiFi, and Bluetooth connectivity for data export and cloud platform upload.
5,600 mAh lithium battery supporting 8-hour continuous field operation.
325 g handheld form factor (190 × 77 × 72 mm) — the most portable and affordable entry point in the HM lineup.
Main Parameters
| Parameter | Specification |
|---|---|
| Test item | Ammonia nitrogen (NH3-N) |
| Reference standard | HJ535-2009 |
| Measurement method | Nessler reagent method / Salicylic acid method |
| Wavelength selection | Automatic |
| Repeatability | <0.5% |
| Stability | <0.5% |
| Sensitivity (absorbance) | 0.001 |
| Sample compatibility | 16 mm (round), 22 mm (round) |
| Colorimetric method | Direct colorimetric (no digestion required) |
Technical Parameters
| Parameter | Specification |
|---|---|
| Operating system | Android smart operating system |
| Display | 3.5-inch color LCD touch screen |
| Light source | Imported cold light source, lifespan up to 100,000 hours |
| Data storage | Over 80,000 records |
| Communication | Type-C, WiFi, Bluetooth |
| Printer | Optional portable Bluetooth printer |
| Battery | 5,600 mAh lithium battery |
| Continuous working time | 8 hours |
| Power supply | 5V/DC |
| Operating environment | 0–50 °C, 0–90% relative humidity |
| Dimensions | 190 × 77 × 72 mm |
| Weight | 325 g |
| Supported languages | Simplified Chinese or English |
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