Precision-thermistor string

Precision-thermistor string – Up to 48 temperature sensors at one measuring cable, vertical and horizontal measurements

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The precision-thermistor string is a highly versatile device to monitor waters, fountain levels, soil profiles etc.
With optional RS485 interface the measuring string can be used to create temperature profiles in geothermal applications.

Temperature is measured by up to 48 high-precision temperature sensors, connected to an enviLog-Datalogger.

In addition to a linear array of sensors at customized distances, a star-shaped arrangement of the sensors is also possible.

  • Up to 48 temperature sensors at one thermistor string
  • Individual string length and sensor positions according to customer requirements
  • String or star-shaped arrangement of the sensors
  • Factory calibration
  • Option: each temperature sensor can be synchronized individually
  • Connection to enviLog-Datalogger via SDI12
  • Cable length up to 500 m; Max. water depth 100 m (10 bar)
  • PUR cable, low-adhesion, halogen-free, good hydrolysis and microbial resistance, strain relief of Kevlar yarn
  • Extreme tensile strength of the cable 
  • Low power consumption
Measuring String  
Measuring range: -20...+ 80 °C
Resolution: 0,001 °C
Accuracy (ex factory): ± 0,1 °C (with comparison +/- 0,1 °C)
Number of sensors per thermistor string: 1...48
Output: SDI 12, RS 485, Modbus
Voltage supply: 6-16 V (SDI12)
4-16 V (RS485
Current consumption per knot: 10/0,8 mA/μA (SDI12)
5 mA constant (RS485)
Maximum water depth: 100 m (10 Bar)
Diameter: cable 6 mm, sensor 14 mm
Tensile strength: 500 N/cm²
Frequently asked questions about "Water quality":

You send us your defective unit together with our repair form and we take care of everything else. If a replacement is necessary, we can, in individual cases, already send a replacement unit after testing (subject to availability). Repairs are carried out by us or by the manufacturer. We endeavour to carry out as many repairs as possible in-house in order to keep repair times as short as possible.

Windows10 compatible operating software is available for all current and most older YSI units.

Virtually all YSI measuring instruments are serviced and repaired in our own workshop, which reduces costs and shortens repair times. Measuring instruments from other manufacturers usually have to be sent in.

Mass development of cyanobacteria can severely reduce water quality and significantly limit water use. They produce a variety of secondary metabolites that act as allelochemicals, antibiotics, hormones and toxins and can harm fish and zooplankton, for example. Some of the toxins are among the strongest natural poisons and can also be hazardous to human health. For example, bathers can develop allergic skin reactions and also inflammations. If one swallows water containing cyanobacteria, there can also be stomach and intestinal infections.

Source:
https://en.wikipedia.org/wiki/Cyanobacteria

Nowadays, the turbidity of a liquid is still determined optically, but measured by means of electronic evaluation. The wavelength of the measuring radiation is usually in the infrared range at 860 nm (according to ISO 7027).  As a rule, a distinction is made between two measuring methods:   The attenuation of the transmitted light radiation (transmitted light), best suited for the detection of larger turbidities. The lateral scattering of the light radiation (scattered light), best suited for the detection of small turbidities.

Source:

https://en.wikipedia.org/wiki/Turbidity

 

Yes, a winch controlled via the depth position of the multi-parameter probe can record the water quality parameters at different depths at selected time intervals. In this way, diurnal variations in stratification can be measured, recorded and made available via remote data transmission.

In principle, yes, it is possible to test a loan unit for one week without obligation (subject to availability). We will be happy to demonstrate the device at your premises or send it to you free of charge.

please contact us at hydro@ecotech.de for more information