Pressure gauge for tensiometers with integrated measurement converter (analog sensor) and programmable switching module for measuring suction tension and controlling irrigation, similar to an irrigation computer.
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Use: |
Electrical switching sensor for connection to nonanalog automatic watering systems as starter or for independent automation of watering systems either as single unit (1 irrigation circuit) or as a series of sensors for use with multiple circuits with output to a solenoid valve or relay pump to each individual unit. Additionally, each SensorMat produces an analog measurement signal for visual readout or external recording of the substrate moisture level (also see E-sensor). The sensor and switching parameters are programmable via PC and are saved in each SensorMat unit respectively; this enables operation of the SensorMat system without a PC. Online use with recording and saving of moisture levels is possible with every office PC. |
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Required accessories: |
Bottom part of a tensiometer with threaded neck piece (GL 14) as well as connecting box depending upon system configuration (see Accessories); connection to mains power supply when power source not otherwise available. |
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Article number: |
1550 SensorMatic Model 500, 1551Sensormatic Model 350 |
Technical Description
Housing: Cylindrical PVC and acrylic glass casing, ?26 mm, height 80 mm, with protective gray covering (Shrink Wrap), weight ca. 35 g. Pressurized connections: screw cap with exchangeable o-ring-washer (7 x 2.5 mm) for direct connection to the tensiometer, neck piece threading GL 14.
Pressure gauge: piezosensitive pressure gauge with differential pressure measurement, typical accuracy (expressed as % of the measurement range): linearity + hysteresis: ?0.2, temperature sensitivity (0-50?in reference to 25蚓): ?0.4, accuracy by repetition: ?0.2, consistency over 1 year: ?0.1; operating temperature: ?0蚓 through +85蚓, maximum pressure: 1.3 bar; typical standard measurement range: 350 hPa.
Power supply:.12 ?6 V DC (preferably 12 (13) V), external power supply; maximum load dependent upon system configuration. Switching output: 13 ?26 V DC, depending on the source, elec. current: max. 1 A, continuous current: 0.7 A, safe against short circuits and overload. Manual start und stop via outer contact. Alarm output: 13 ?26 V DC, max. 1 A (ohmic load), as contiuous signal, single output alarm from connecting box or buzzer; direct LED alarm on connecting box. Measurement output: measurement signal: 0.96 ?4.8 V DC corresponding to the range 0 ?591 hPa, or alternatively 0 - 394 hPa.
Switching lock feature: shuts off output of the SensorMat during irrigation (any grouping desired), voltage: 5 V DC, with electronic extra which is useful for external control (central pump, shut off times).
Electrical connection: shielded, highly flexible cable directly connected to sensor, 8 stranded, ?4.7 mm, 0.1 mm? cable output port located on housing, nonkinking; cable length: 4.8 m, protection type: IP 54, safe against false connection.
Serial switching connection: via connection box (serial connection box) max. 31 SensorMatics in a series, with clamp connection, connection for power, locking feature, alarm or digital use via 6 stranded cable, max. cable length for digital use: 75 m, PC-Interface: RS 232 (for greater distances: RS 485).
Software: Operating System: Windows 95/98 + Windows NT, optional Windows CE.
Program settings: switches on according to hPa values (in steps of 2-3 hPa), switches off according to either hPa or min. (predetermined or variable), multiple switching, interval watering, switching lock, monitoring of moisture levels/ tensiometer functions/ dryness, sensor adjustment, manual switching operation, record keeping and display (online).
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Accessories |
Connection Boxes (Art. Nr. / Description) |
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1560 Master box |
1561 Serial box |
1562 Interface box |
1563 Single box |
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Function |
Connection box for digital use with a PC (online) or PC-Laptop connection for onsite adjustments; only needed 1x for serial layouts |
Normal connection box without digital features (single or multiple circuits) |
PC-connection box for programming of individual sensors |
Connection for SensorMats as starter for automated systems |
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Differences |
Complete unit, with digital connection, Alarm-LED, Interface plugs, outer controls |
No digital connection or plug jacks, otherwise like 1560 |
Digital connection, without plug jacks and cable ports, no LED, housing as in 1560, incl. connecting cable to a PC |
No electrical parts, 8 double clamps (Cache Clamp), 2 cable input ports |
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Features in common |
Size: 95x95x58 mm
(without cable input ports), polystyrol (or optionally
polycarbonate), with 6 cable input ports PG 7, |
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Extender box with replication switch for 4 serial solenoid switches currently being planned.
