High-Precision Dissolved Oxygen Monitoring System Reliable Online Water Analyzer for River and Lake Protection Erun-Sz4-a-A5

• Customization: Available
• After-sales Service: Provide Timely and Accurate Online After-Sales Ser
• Warranty: 1 Year
• Model NO.: Erun-SZ4-A-A5
• Display: Digital
• Appliance: Medical Research, Biochemistry, Laboratory
• Portable: Non Portable
• Certification: CE, ISO9001
• Type: Online Dissolved Oxygen Meter
• Weight: 0.5kg
• Power: 3W
• Parameters: Dissolved Oxygen
• Model No.: Erun-Sz4-a-A5
• Mounting: Flow-Through
• Transport Package: Carton
• Specification: 144mm*144mm*130mm
• Trademark: EURN
• Origin: China
• HS Code: 90278099

Product Description

Introduction
 

This product is a new online dissolved oxygen sensor for water quality, developed independently by the Erun Group. It features high stability and precision, automatic temperature detection and compensation, and can accurately measure the conductivity and temperature of solutions. It is widely used for online monitoring of dissolved oxygen in water in aquaculture, petrochemicals, environmental monitoring, aeration tanks, water plants, power plants, sewage treatment, and industrial wastewater treatment.

 

Product Features
 

1. LED display with intelligent Chinese/English menu operation.
2. High-impedance preamplifier: High input impedance, noise immunity, and strong anti-interference capabilities.
3. Multi-parameter simultaneous display: Simultaneously displays pH, temperature, two current outputs, and relay operating status.
4. Output signal: Software selectable 0-20mA or 4-20mA output. User-defined password: Users can set or modify their own password to prevent unauthorized access and misoperation.

Technical Parameters

Controller Technical Parameters

Display	LED
Signal Output	0-20mA (load resistance <750Ω) 4-20mA (load resistance <750Ω)
Power	85-265VAC ±10%, 50±1Hz, power ≤3W; 9-36VDC, power ≤3W
Communication Output	RS485 Modbus RTU
Ambient Temperature	-10°C to 60°C
Relative Humidity	≤90%
Dimensions	144mm*144mm*130mm (H*W*D)
Mounting	Embedded  (opening size: 138*138mm)
Weight	0.5kg

 Sensor technical parameters
 

Measuring range	0.00-20.00mg/L
Accuracy	±3mg/L
Resolution	0.01mg/L
Temperature measurement range	0.0-60.0°C
Temperature sensor	NTC22K (Pt100,Pt1000,NTC2.252K optional)
Response time	90%<90s
Cut-off flow rate	>0.02 mg/L
Maintenance intervals	Replenish or replace the electrolyte every 3-6 months and replace the membrane head every 6-12 months
Calibration interval	Once a month
Pressure range	0-2 bar
Housing material	ABS
Connecting thread	M39*1.5
Signal cable length	5 meters or customized
Electrical connection	Pin or BNC connector
Mounting method	flow-through
Ingress protection	IP68

 

Certifications

 

Application