| Voltage outputs | Continuous analog voltage or pulse analog voltage, user selectable +0 to +2.5V or +0 to +5V are available. Pulse threshold, integrator timeout and duration are also user selectable. The continuous analog voltage persists on the outputs so that output voltages can be read at any time. |
| Wind speed scaling | Sensitivity @voltage range +2.5V: [10 mV/(km/h)] i.e. +2.5V corresponds to 250 km/h Sensitivity @voltage range +5V: [20 mV/(km/h)] i.e. +5V corresponds to 250 km/h |
| Particles flux scaling | Sensitivity @voltage range +2.5V: [10 mV/(g/m2/s)] i.e. +2.5V corresponds to 250 g/m2/s Sensitivity @voltage range +5V: [20 mV/(g/m2/s)] i.e. +5V corresponds to 250 g/m2/s |
| Supply | Ratings |
| Voltage | 6 V to 30 V DC (9.6 V and 16 V DC in case of powering through the SDI-12 terminals) |
| Current | < 1 mA in stand-by mode and 20 mA max in acquisition mode. For a typical nominal duty-cycle of 10%: 2.1 mA (20 mA for duty-cycle of 100%). |
| Mode | Description |
| Analog | Pulse and continuous (and persistent) voltages, 0-2.5V or 0-5V |
| SDI-12 | Yes |
| RS-232 TTL | Yes |
| Modbus RTU (RS485) | Yes (Note: requires the Modbus adapter accessory) |
| Material | Stainless steel and aluminium Ematal anodized (breakdown voltage > 40 V/μm) |
| Weight | 5 kg (including mounting kit) |
| Dimension (H x W x D) | 1040 mm x 874 mm x 32 mm (with mounting kit) |
| Installation | Universal mounting kit provided |
The SND sensor is an ultra-robust instrument for measuring solid particle flux intensities and wind speeds. It is a low-power, maintenance-free and totally sealed acoustic instrument with no moving parts. The sensing part of the instrument is a cylindrical, anti-abrasion, anti-adhesion and anti-rime coated tube supported by two strong stainless-steel arms. The impact of drifting snow and the friction of laminar wind induces a change in internal acoustic pressure. The excitation by snow and wind is discriminated by a specific acoustic, mechanical and electronic design.
“HailSens represents the culmination of years of dedicated research. As the only hail sensor that seamlessly integrates with hailpad data – the gold standard for scientists worldwide.”
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