CBS bubble sensor
CBS bubble sensor
Attention: Due to the current delivery situation, please request the product by email or via our contact form!
The OTT CBS works according to a drift-free measuring principle and covers a measuring range of up to 30 m.
An integrated compact piston pump generates the bubble pressure required for the indirect measuring method.
The compressed air in the water is blown out through a bubble pot via a connected pressure line - after the blowing process, a pressure equilibrium is established between the line pressure and the water pressure at the bubble pot. A pressure measuring cell in the OTT CBS measures the air pressure and the prevailing line pressure one after the other. The exact water level is calculated with drift compensation by calculating the difference between the two signals.
The measurement result is available via an SDI-12 interface or via a 4...20 mA analog signal.
The measuring and pumping process is carried out at adjustable measuring intervals – after the measurement has been completed, the OTT CBS switches off until the next measuring cycle (standby mode).
Technical data:
| measuring range | |
| "Standard" version | |
| and "USGS Specification" | 0...15 m (0...50 ft) |
| version "30m measuring range" | 0...30 m (0...100 ft) |
| resolution | 1 mm (0.01 ft) |
| accuracy | |
| "Standard" version | |
| and "30m measuring range" | ±5 mm |
| version "USGS specification" | 0...15 ft: ±0.01% |
| 15...50 ft: ±0.065% of measured value or ±0.02 ft, | |
| whichever is lower | |
| units | cm, m, ft, bar, PSI |
| interfaces | 4...20 mA, SDI-12, SDI-12 via RS 485 |
| supply voltage | 10 30 V DC, typ. 12/24 V DC |
| power consumption | |
| query interval 1 min | typ. 320 mAh/day |
| query interval 15 min | typ. 25 mAh/day |
| Dimensions L x W x H | 165 mm x 205 mm x 115 mm |
| Weight | approx. 1500 g |
| housing material | ABS |
| protection class | IP 43 |
| temperature range | |
| Operation | –20...+60 °C |
| storage | –40...+85 °C |
| Relative humidity | 10...95%; non-condensing |
| bubbler line | Inner diameter typically 2 mm or 4 mm |
| EMC limits | IEC61326 and EN61326 are complied with |
