KWS-671 Portable Handheld Dissolved Oxygen Meter
Overview
The KWS-671 is a portable handheld meter for dissolved oxygen measurement in the field. The microprocessor-based instrument automatically recognises Kacise digital sensors and combines measurement, display and data logging in a single handheld platform, with a sealed keypad, a backlit LCD and USB data transmission to a PC.
The DO sensor adopts fluorescence lifetime technology based on the quenching of active fluorescence. Because the measurement consumes no oxygen, there is no flow-rate limitation, no electrolyte to preheat or replace, and no frequent calibration and maintenance. Response time (T90) is as low as 20 s, which makes dissolved oxygen readings faster, more stable and more accurate on site.
Automatic temperature and air-pressure compensation, together with manual salinity input, keeps readings reliable in unstable water bodies such as aeration tanks and sewage treatment plants. The meter supports automatic locking of the dissolved oxygen reading, a selectable probe filter mode, one-point or two-point user calibration, and storage of up to 40,096 results exportable through the USB interface.
Features
- Portable handheld design with keypad and back-lit LCD — clear interface and simple operation
- Automatic recognition of digital sensors; hot plugging is supported
- Automatic temperature and air pressure compensation, manual salinity compensation
- No electrolyte, no oxygen consumption, no flow-rate limitation, no preheating required
- Automatic locking of the reading and a selectable filtering mode for unstable water bodies
- Data logging of up to 40,096 results, exportable to a PC through the USB interface
- One-point or two-point user calibration
- Response time (T90) as low as 20 s
Typical Applications
- Aquaculture and fishery water quality control
- Aeration tanks, sewage treatment plants and industrial wastewater
- Rivers, lakes, reservoirs and other surface water monitoring
- Drinking water plants and environmental protection spot checks
- Field verification and calibration of inline dissolved oxygen sensors
Ordering Information
Each set includes one handheld meter, one DO sensor (5 m cable standard, optional length available), two 18650 rechargeable batteries (3,350 mAh / 3.7 V), one Micro USB cable, one wristband and one screwdriver for the battery compartment.
| Parameter | Value |
|---|---|
| DO Sensor | |
| Sensor type | Full immersion probe |
| Range | 0-50 mg/L or 0-500% air saturation |
| Accuracy | 0-20 mg/L: ±1% or ±0.2 mg/L >20 mg/L: ±5% or ±0.6 mg/L |
| Response time | 20 s |
| Drift | <1% per year |
| Temperature sensor | NTC |
| Working temperature | 0-50 ℃ |
| IP rating | IP68 |
| Maximum pressure | 6 bar |
| Interface | Matched handheld meter |
| Size | Φ26 mm × 175 mm |
| Cable length | 5 m standard (customizable) |
| Weight | 204 g |
| Material | 316L |
| Handheld Meter | |
| Size | 220 mm × 96 mm × 44 mm |
| Weight | 460 g |
| Power | Two 18650 rechargeable batteries |
| Working temperature | 0-50 ℃ |
| Storage temperature | -30~70 ℃ |
| Display | 54.38 × 54.38 mm LCD, back illuminated |
| Data storage | Support |
| Pressure compensation | Built-in, auto compensation in 50~115 kPa |
| IP rating | IP67 |
| Timed shutdown | Support |
