Data Logging Water Quality Testers for Accurate Analysis – GAOTek

Description Overview These data logging water quality testers are designed to provide highly accurate and repeatable measurements using the principle of ultrasonic propagation time difference. With dual CPUs and floating-point operation, they ensure fast and reliable data processing. The device supports multiple signal inputs including pressure, temperature, and liquid level, along with versatile outputs such as RS485, 4-20mA, and Modbus RTU protocol. A bilingual display and flexible button operation make usage simple and convenient. The system also offers automatic memory storage for daily, monthly, and yearly data, along with detailed logging of flow rates and power cycles. Durable sensors ensure adaptability for varied applications.   Features Measurement accuracy level 1.5 with 0.2% repeatability Flow rate range 0.3–6 m/s depending on pipe size Ultrasonic time difference principle with dual CPUs Fast measurement period of 500 ms Multiple analog and platinum resistor inputs RS485, 4–20mA, and Modbus RTU communication support Optional HART and OCT output integration Bilingual backlit display with easy operation Automatic memory of up to 10 years of data External, insertion, and tube-type sensor compatibility   Technical Specifications Measurement Accuracy Level 1.5 Repeatability 0.2% Flow Rate Range DN200 & below: 0.3–4 m/sAbove DN200: 0.3–6 m/s Measurement Principle Ultrasonic propagation time difference, dual CPUs, 4-byte floating-point operation Measurement Period 500 ms (2 times/sec) Working Power Supply Isolated DC 8–36V or AC 85–264V Signal Input 3 × 4–20mA analog inputs (pressure, liquid level, temperature)2 × three-wire platinum resistors Signal Output 1 × isolated RS4851 × isolated 4–20mA / 0–20mA (active/passive) Optional HART protocol Dual isolated OCT outputs1 × bidirectional serial interface (for peripherals: 4–20mA, frequency signals, thermal printers, data loggers, etc.) Protocol Modbus RTU Power Consumption 50mA (keyboard disconnected, buzzer off) Display 2 × 10 Chinese character backlight display (Chinese/English bilingual optional) Operation 16-button or 4-button window operation Data Storage Auto memory: last 512 days, 128 months, 10 yearsStores ± net accumulated flow (last 30 times) Logs power-on/off times & flow ratesData readable via Modbus Sensor Types External, Insertion, Tube type