Cảm biến đo độ bốc hơi nước Campbell Scientific 255-100
Overview
The 255-100, manufactured by Novalynx, determines evaporation rate by measuring the changing water level in your evaporation pan. The evaporation gauge produces a resistance output that Campbell Scientific data loggers can monitor. The 255-200 or another standard National Weather Service Class A evaporation pan must be purchased separately.
Benefits and Features
- Compatible with most Campbell Scientific data loggers
- Low-power device for reading the water level of an evaporation pan such as the 255-200
Detailed Description
The 255-100 consists of a float, pulley, and counterweight attached to a precision 1000-ohm potentiometer mounted through a gear assembly in a weatherproof housing. It has a triangular base plate equipped with three leveling screws and a bubble level. The potentiometer produces a resistance output proportional to the position of the float, which can be monitored on site using a data logger or monitored remotely by telemetry equipment.
The 255-100 can be placed directly in the pan, or connected to the pan using the 255-100P/F stainless-steel pipe and fittings. Instead of using the 255-100P/F, a 1/2-in. polybraid (fiber reinforced) flexible tubing, nylon fittings (1/2-in. NPT x Hose Bar), and small stainless-steel hose clamps can be used; this equipment is available from a local hardware store.
Specifications
| Water Input Port |
1/2-in. NPT coupling, female |
| Counter Weight |
114 g (4 oz) stainless steel |
| Total Resolution |
0.76 mm (0.03 in.) |
| Potentiometer Accuracy |
0.25% |
| Rotation |
360° continuous |
| Electrical Angle |
340°, ±1° (20° gap) |
| Resistance |
1,000 ohm, ±10% |
| Operating Temperature Range |
-40° to +60°C
Evaporation is normally not measured at temperatures below freezing. |
| Linearity |
0.25% |
| Mechanical Range |
0 to 254 mm (0 to 10 in.) |
| Electrical Range |
0 to 240 mm (0 to 9.44 in.) |
| Float |
10.2 cm (4 in.) diameter, plastic |
| Cable Description |
3-conductor, 24 AWG, shielded |
| Cable Length |
15 m (50 ft) |
| Diameter |
203 mm (8 in.) |
| Height |
700 mm (27.5 in.) |
| Base Dimensions |
40.6 cm (16 in.) triangle with leveling screws |
| Weight |
3.4 kg (7.5 lb) |
| Shipping Weight |
6.8 kg (15 lb) |
Tài liệu
Brochures
Manuals
