Irrometer Company, Inc.
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Irrometer - Model AVS - Automatic Vacuum Switches
“AVS" Automatic Vacuum Switches are designed for use on IRROMETER instruments and provide direct switching capabilities according to soil moisture status. Soil water tension readings greater than the moisture set point can activate an irrigation valve solenoid, time clock or warning device. A switch mechanism is mounted on the instrument body and can be field adjusted by hand to the desired set point. The switch scale reads in centibars (cb) or kilopascals (kPa) of soil water tension.
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- Activated switch at moisture set point
- Available for AC or DC circuits
- Available with switch closed past setting
- Sealed from dirt and moisture
- Compatible with any conventional 24 VAC valve system and DC controllers with a sensor circuit
- OUTPUT: Open/Closed
- WEIGHT: 0.2 lbs. (0.09 kg)
- DIMENSIONS: Body Length = 3.75-inch (95 mm) HEX = 1.0 inch (25 mm)
- CABLE: 18” Wire Leads
- RANGE: 5 to 85 centibar (kPa) with less than 10% of actuation point differential
- OPERATING TEMPERATURE: 32° to 150° F (0° to 66° C)
- CONNECTION: 1/4-inch brass male NPT
- MECHANISM: SPST Snap action switch with Buna-N diaphragm, closed at and drier than set point, rated for 1,000,000 cycles
- SWITCH RATING: 24 VAC 10 amp maximum. Includes 18-inch (45 cm) AWG 18 wire leads
- REPEATABILITY CATEGORY: ± 2% of full set point range at 70°F (21°C) Ambient Temp
- PROTECTION CATEGORY: IP 69
- COMPLIANCE: CE, RoHS