Dishes Still Slippery and Smelling of Detergent When the Door Opens? NL-TRB-4 Turbidity Sensor and Dosing Closed-Loop Bench, Six Stations (dishwasher test equipment)

Dishes that come out slippery to the touch, glasses with a film when held to the light, and a detergent smell the moment the door opens; or the opposite, plates still greasy with rice stuck on while the machine ran a light-soil program that dosed almost nothing. The fault sits at both ends of the loop: the turbidity sensor window films over with grease and soil so the soil judgement walks off, and the dosing pump loses accuracy, with shot volume dropping further after tens of thousands of strokes. The line usually runs one wash on standard soiled dishes; whether the sensor still judges real greasy loads, and whether every shot is still accurate after long duty, never gets measured before shipment, so households compensate by adding detergent and running the cycle twice.

What the NL-TRB-4 turbidity sensor and dosing closed-loop bench measures

• Six stations in parallel cycling standard soiled dish loads and blended soil liquor, with sensor readings compared against a bench turbidimeter every round to quantify the judgement error (the sensing and dosing branch of our dishwasher test equipment)
• Grease-fouling duty: continuous high-fat programs tracking reading decay as the sensor window fouls and how well self-cleaning recovers it
• Dosing pump accuracy: calibrated step by step against each program level, logging the deviation of every shot and the drift trend after tens of thousands of strokes
• Closed-loop verification: soil judgement and dose size linked, checking whether light and heavy soil levels switch in time with no under- or over-dosing
• Rinse residue: conductivity and surfactant residue in the final rinse water used to flag over-dosing
• Line clogging and crystallization: low-grade detergent and hard water duty, with the clogging trend recorded
• Barcode and batch binding, with raw data exported per unit for sensor and pump lot comparison

Applicable standards

GB 4706.1 (household appliances – general safety), GB 4706.25 (dishwashers – particular requirements), IEC 60436 (electric dishwashers – methods for measuring performance), GB/T 20290 (electric dishwashers – methods for measuring performance) and GB/T 2828 sampling; criteria can follow the customer’s standard and the program logic.

Stations and throughput

Six stations running 24/7 turn a feel of the plates and a sniff at the door into turbidity readings, dosed grams and residue levels, with judgement error and dosing accuracy rechecked round by round — so incoming sensors and pumps, and end-of-line machines, can both be sampled batch by batch, stopping detergent residue and poor wash results before shipment.

Manufacturer

Guangdong Endurance Electronic Equipment Co., Ltd. — a non-standard testing equipment manufacturer of turbidity sensor and dosing closed-loop benches, dishwasher test equipment, washing machine test equipment, pump test bench and pump performance test systems and level sensor life test machines.

Keywords: pump test bench, pump performance test, level sensor life test, dishwasher test equipment, washing machine test equipment.