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Why Buy Direct from a Water Quality Sensor Manufacturer?
When you source water quality sensors through distributors or trading companies, you pay extra layers of markup — often 20–50% above factory price — without gaining any technical advantage. Buying direct from the manufacturer means:

•Lower unit prices with no middleman margin
•Direct technical support from the engineering team that built the product
•OEM and customization options — cable length, range, housing material, communication protocol
•Faster lead times with no intermediary delays
•Traceable quality — factory certifications, calibration records, and test reports direct from the source

Kainafu — A Verified R&D Water Quality Sensor Manufacturer
Shenzhen Kainafu Technology Co., Ltd. is not a trading company. We are an in-house R&D and manufacturing operation based in Shenzhen, China, holding:

•ISO 9001 Quality Management System certification
•ISO 14001 Environmental Management System certification
•CMA metrological testing reports
•Water Quality Monitoring Platform" software copyright registration

Our factory produces 50+ types of water quality sensors and monitoring systems across three product series, covering every major water quality parameter — all designed, manufactured, and calibrated under one roof.

4 Best-Selling Kainafu Sensors to Know
1. KNF-101PRO — pH / ORP Sensor
The most universally needed water quality parameter. The KNF-101PRO measures pH (0–14, ±0.02 accuracy) and ORP simultaneously, supports both submersible and pipeline installation, and delivers clean digital data via RS-485 Modbus RTU. IP68 rated to 6 bar / 50 m depth. Ceramic sand core junction resists biofouling — a key reason our electrode lasts 12–18 months versus the 3–6 months typical of cheaper alternatives.
Suited for: drinking water, wastewater, aquaculture, industrial process water

2. KNF-103B — Dissolved Oxygen Sensor
Based on fluorescence quenching technology — no membrane, no electrolyte, no frequent calibration. Unaffected by H₂S, ammonia, or heavy metals. Sensor drift is less than 1% per year, and response time is under 10 seconds. Built-in temperature compensation ensures accuracy across the full operating range.
Suited for: aeration basins, aquaculture ponds, river monitoring, wastewater treatment

3. KNF-108A — COD / TOC Sensor
UV absorption method measures COD, TOC, and turbidity simultaneously in real time — no reagents, no sampling delay, no chemical waste. Automatic turbidity interference compensation ensures stable readings even in heavily loaded wastewater. 316L stainless steel housing with integrated self-cleaning brush for long-term unattended deployment.
Suited for: effluent compliance monitoring, surface water, industrial discharge, sewage treatment

4. KNF-1004Pro — Turbidity Sensor
Compliant with ISO 7027 and USEPA 180.1. Infrared light source is unaffected by sample color — unlike visible-light sensors that give false readings in colored effluent or tea-colored surface water. Integrated self-cleaning brush prevents fouling. Available in 0–1,000 NTU and 0–4,000 NTU ranges.
Suited for: waterworks, construction site discharge, wastewater effluent, surface water stations

The Full Range — One Factory, Every Parameter
Beyond these four, Kainafu manufactures the complete spectrum of water quality sensors from a single factory:

One supplier. One quality standard. No compatibility headaches.

Ready to Order or Request a Quote?
Whether you need a single sensor for evaluation or a multi-point monitoring network, our team responds within 24 hours.