The primary focus in the development of the new ECO-line was placed on the essential functions of the measurement technology.
Pure measurement with a focus on precision, speed and reliability and compact packaging enable an impressive price/performance ratio.
The devices also have impressive ergonomics, dust and water protection according to IP 65/67 and backlit display.
The ECO 531 an intelligent oxygen measuring device for fishery, fish breeding, aquarium, aquaculture and well water measurement applications.Oxygen:

±1.5 % of measurem. Value ± 0,2 mg/l or
±1.5 % of meas. val. ± 2 % O2 saturation

Temperature:
±0.3 °C

Power supply:

2 x AA Alkaline batteries (included)

Power consumption:

<1 mA

Weight:

approx. 240 g (including sensor)

Housing material:

Break-proof ABS housing

Measuring range:

0.0..20.0 mg/l (or ppm) O2 concentration

Connections:

Galvanic sensor (active membrane type),
KOH electrolyte
2 m or 4 m cable, permanently connected to the device, with integrated temperature sensor

Operating conditions:

-20.. +50 °C, 0..95 % r.H.

Storage temperature:

-10 to 60 °C (without batteries)

Protection type:

IP65 / IP67

Display:

3-line with battery status indicator, Backlight, protected by shatterproof screen, overhead display at keypress

Dimensions:

108 x 54 x 28 mm (instrument without sensor) (H x W x D)

Additional functions:

Stability recognition, automatic adjustment to environmental air

Resolution:

0..200 % O2 saturation

Activation time T95:

10 s at nominal temperature

Sensor operating pressure:

max. 3 bar (~30 m water depth)

Sensor range of application:

0..60 °C

min. flow:

30 cm/s (in standing water by stirring or moving the sensor up and down)

Compensation:

Temperature : automatically with integrated temperature measurement
Air pressure : Compensation possible with manual input (normally not necessary)
Salinity : with manual entry