High-Rise Secondary Supply
Benchmark Secondary-Supply Monitoring at Guiyang's Hanlin Xiyuan Towers
1 / 4Project Background
Hanlin Xiyuan is a high-rise residential development in Guiyang with zoned secondary supply — high, medium and low pressure zones fed from a basement pump house. The project was delivered with Qingdao Sanli, a leading secondary-supply equipment company, as the head contractor.
Customer Challenge
Zoned supply means small chlorine fluctuations at low range — demanding real measurement precision — while day-to-day operation falls to a property team without instrument specialists. Equipment had to be highly stable and low-maintenance, and installation had to work in a cramped underground pump house.
The TENGINE Solution
FCL residual chlorine analyzers (with pH) and MTU high-precision turbidity analyzers were wall-mounted at the zone outlets and the tank inlet front, with sampling drawn from the tank inlet's front-end solenoid valve position and outlet piped straight to the drain — a clean, standardized installation. MTU's high accuracy and FCL's stable chlorine performance fit the low-chlorine, low-turbidity reality of secondary supply.
Implementation
Standardized wall-mounted installation was completed across the zones in the basement pump house, integrated with Qingdao Sanli's secondary-supply equipment package.
Project Results
The project became a benchmark: standardized installation and operation now give the property team reliable, long-term online monitoring with minimal skill required. The proven configuration — delivered alongside Qingdao Sanli — has become the reference template for large-scale rollout of community secondary-supply monitoring.
Related Case Studies
Conventional chlorine instruments need frequent electrolyte and DPD reagent replacement — unaffordable at this scale. Community pump rooms are cramped, and most devices on the market cannot measure stably down at the 0.05 mg/L national limit where secondary-supply compliance is actually judged.
Secondary supply adds storage and pressurization after the municipal network, and water quality can degrade in tanks and pipes. Without online monitoring at the pump station, a quality problem would only surface at residents' taps.
At the network's far end inside the park, residual chlorine and turbidity readings run low — below the reliable range of ordinary instruments. The park needed monitoring accurate enough at low concentrations to prove its water was truly safe.
Facing a similar monitoring challenge?
Tell us about your application — our engineers will reference this project experience and design a solution for your site.