Portable Turbidity Meter
Ideal for turbidity measurement of industrial wastewater, construction wastewater, and environmental water such as river and lake water.
The TB-31 Portable Turbidity Meter features high reliability in low concentration regions, power saving design (120 hour continuous measurement with only two AA alkaline batteries), and waterproof construction for field measurement (IP67: The unit can be submerged at 1m depth for up to 30 min). Its immersion-type sensor is perfect for simple turbidity measurements in the field.
- High accuracy in low concentration regions.
Repeatability of ± 0.5 NTU in low measurement ranges.
- Power saving design
Requires only two AA alkaline batteries for approximately 120 hours of continuous measurements.
- Immersion measurement for one day monitoring (continuous measurement)
Directly immersing the sensor into sample water makes it possible to monitor turbidity for one day (24 hours or less).
*1 This sensor is not equipped with a cleaning function. Depending on the water quality or service conditions, it may not be possible to measure continuously for up to 120 hours. Please contact us for details.
*2 Maximum water depth is 10 m.
- 1,000 data memory function
Auto-save for specified intervals*
*Short interval memory function: 1 sec. to 99 min. 59 sec. Long interval memory function: 2 min. to 99 hrs. 59 min. (When using the long interval memory function, the power turns off(enters sleep mode)after measuring turbidity for 1 minute. It remains off until the next measurement starts.)
- Great extensibility (Ability to connect the meter to a personal computer, an external printer and a recorder)
We provide optional special data acquisition software for loading measurement data in text format on a personal computer.
|Measurement method||Near infrared 90 degree light scattering measurements|
|Measurement range: Turbidity*1||0.0 to 80.0 NTU (mg/L)
0 to 800 NTU (mg/L)
Range selection: Automatic/ Manual
|Measurement range: Temperature||0 to 50.0°C|
|Display range: Turbidity||0.0 to 88.0 NTU (mg/L) 0.0 to 880 NTU (mg/L)|
|Display ranger: Temperature||-5.0 to 110.0°C|
|Repeatability: Turbidity||±0.5 NTU or less(0.0 to 80.0 NTU range) ±5 NTU or less(0 to 800 NTU range) Measurement conducted using a formazine standard solution under fixed conditions|
|Repeatability: Temperature||±0.5°C or less|
|Water depth||Up to 50 m(equal to 0.5 MPa)|
|External output port*2||RS-232C (non-isolated): Personal computer or external printer EPS-P30 (optional)
Analog output port (non-insulated): Three output ports for turbidity, temperature, and range
|Waterproof construction (main body)||IP67 (enabled when the sensor is connected and the external I/O ports are masked)
* The unit can be submerged at a depth of 1 m for up to 30 min.
|Ambient temperature / humidity||0 to 45°C , no more than 90%(no condensation)|
|Power source||Two AA alkaline batteries/nickel hydrogen batteries
Dedicated AC adapter (6 VA, optional) also available
|Power consumption (3V battery)||Approximately 0.05 W|
|External dimensions||Main body: Approx. 68 mm (W) x 35 mm (H) x 173 mm (D)
Sensor: φ Approx. 30 mm x 240 mm
|Weight||Main body: Approx. 280 g (includes batteries)|
Sensor (cable length 2 m): Approx. 400 g
Turbidity sensor ELL-011 (cable length: 2 m) (only included with the full set) Protection cover (with shoulder belt), size AA alkaline battery (test use) (2) Instruction manual
When you order the optional sensor, select“main body only”for TB-31.
|Product / Model||Cable length|
|Turbidity sensor ELL-011||11m|
|Turbidity sensor ELL-011||30m|
|Turbidity sensor ELL-011||50m|
Other Optional Parts
|Product||Model / Code No.|
|External printer (with connection cable)||EPS-P30|
|Analog output cable (1.5 m)||118N063|
|Data acquisition software||GP-LOG|
|RS-232C connection cable (2 m)||118N062|