With its simple software, long battery life and large memory, the GP1 is very easy to set up and maintain. It is well suited to outdoor logging applications ? the waterproof (IP67) case does not require a secondary enclosure. The GP1's small size allows it to be installed in confined spaces, or to be hidden away if security is an issue. The internal alkaline battery lasts for >1 year when taking hourly readings from 2 moisture sensors, 2 temperature sensors and a rain gauge.
- High accuracy 7 channel data logger
- 600,000 readings
- Compatible with DeltaLINK?Cloud online data viewing and sharing platform
- Smart relay control
Applications
? Monitoring soil moisture
? Environmental data logging
? Climate research and meteorolog
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Specifications
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Typical at +20 °C
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Max ?20 °C to +60 °C
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Notes
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Differential Voltage Channels
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Voltage accuracy
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± (0.3 mV + 0.01% reading)
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± (1.6 mV + 0.05% reading)
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over full ?0.2 V to +2.7 V voltage range
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Soil moisture accuracy
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±0.06%? (±0.0006 m3.m?3)
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±0.3%vol? (±0.003 m3.m?3)
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with ML3 or SM150T (0 to 60% ?) [1]
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Resolution / input noise
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±0.1 mV
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effective resolution of readings (typical)
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Input voltage range
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?0.2 V to +2.7 V
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Input voltage limits
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?2.8 V to +3.6 V [2]
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each input signal relative to logger GND
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Temperature Channels
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Temperature accuracy
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±0.07 °C
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±0.1 °C (with GP1 below 30 °C if reading ?20 to 0 °C)
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using 10K thermistor ?20 to +60 °C [1]
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Resistance accuracy
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±0.2% of 2 to 100K? reading
(±0.3% max)
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±0.5% of 2 to 20K? reading
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Event Counters
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Event counter (Event6)
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< 50>
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logic low input < 1> 1.9 V,
maximum ±14 V on Event inputs 5 and 6
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High speed counter (Event5)
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< 33k>
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Power
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Internal battery life
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1 year typical (alkaline)
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9V PP3 battery [3]
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External power
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11 to 24 V DC
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power via external M8 connector
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Switched sensor power
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up to 120 mA: > 10 V if external power > 13.8 V
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switched battery or external power
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+5 V reference
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5 V ±0.6%
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5 V ±1.6%
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switched voltage reference, up to 50 mA
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Relay Channel
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1 x relay
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SPST, < 30>
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separate ON / OFF conditions adjustable ON duty cycle
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Data Recording
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Logging frequency
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1 second to 24 hour
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user configurable logging frequency
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Sensor warm?up
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multiples of 1 second
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user configurable sensor warm?up times
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Internal flash memory
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> 600k readings, typical
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non?volatile flash memory
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Communications
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RS232 (115 kbaud) / USB [4]
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comms via external M8 connector or USB [4]
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Physical
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Environmental
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water resistant to IP67
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4 cable glands, connector & case
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Size and weight
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140 x 105 x 45 mm, 280 g
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including battery
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Temperature
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?20 to +60 °C
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