Yosemitech Y600‑A multifunctional handheld meter, paired with Y561‑A ammonium sensor, forms a lightweight portable rapid ammonia nitrogen detection system. Designed for field surveys, on-site pollution source verification, emergency monitoring, water sample comparison and calibration, and on-site sampling inspection at factory discharge outlets, it requires no laboratory pre-treatment and enables in-situ rapid determination of ammonia nitrogen in water bodies.

Y561‑A ammonium sensor adopts the ion-selective electrode method for measurement. It requires no chemical reagents and produces no secondary pollution. Integrating an ammonium ion electrode, pH electrode and reference electrode, the sensor automatically performs pH and temperature compensation during measurement to ensure accuracy under various water conditions. Its measuring range is 0–100 mg/L (0–1000 mg/L optional), with an IP68 protection rating, allowing direct immersion in water for testing. The electrodes can be replaced individually to reduce long-term maintenance costs. Featuring digital RS‑485 output and Modbus protocol support, the sensor can be automatically identified and data read by Y600‑A handheld meter.

When paired with Y600‑A multifunctional handheld meter, the meter comes with a backlit LCD screen and physical operation keys for plug-and-play use. It supports one-touch sensor recognition, on-site 1-point or 2-point calibration, and local data storage. Test records can be exported via USB port for convenient data archiving and traceability. The meter is equipped with a built-in rechargeable battery for long endurance. Compact, portable and drop-resistant, it is suitable for harsh field environments. Besides ammonia nitrogen measurement, it is compatible with other digital water quality sensors of Yosemitech series, enabling multi-parameter detection for versatile application.

The meter eliminates the cumbersome digestion and reagent preparation procedures required by the traditional spectrophotometric method. Readings can be obtained immediately after immersion at the sampling site. Widely applicable to freshwater scenarios such as surface water, river and lake surveys, industrial wastewater discharge outlets, and on-site sampling comparison for scientific research, it delivers an efficient and reliable on-site ammonia nitrogen testing solution for environmental monitoring, third-party testing institutions and enterprise self-inspection.