Overview
HR8800 water level recorder is a groundwater monitoring instrument with external power supply and internal battery self-power supply. It can be used for long-term recording of water depth (pressure) and temperature. It is all stainless steel structure. The water level recorder contains water level and temperature sensor. Loss memory and high-capacity long-life lithium battery, all functions are integrated in the instrument with a diameter of 24mm metal, suitable for water level measurement of surface water, groundwater and marine environment.
Features
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l High stability liquid level measuring sensor term stability
l High precision, up to 0.05% F.S
l Temperature measurement, resolution 0.05 ° C
l Full temperature zone digital temperature compensation, full scale digital calibration
l Strong overload capability
l Wide power supply, 5~30VDC
l RS485 standard MODBUS-RTU protocol, can be used in DCS or PLC system
l Internal recyclable record 25984
l Low power consumption, sleep current operating current <5μA
l The product also has reverse power protection and surge protection
l All stainless steel (or titanium alloy) housing sealing structure, IP68 protection
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Specification
Main performance indicators | |
Water level range | 0～10ã€20ã€50ã€100mH2O |
User specified range, factory calibration | |
Precision | ＜±0.05％F.S　 |
Resolution | 0.005ï¼…F.S |
Long-term stability | ＜±0.05%F.S/year |
Overload capability | ＞2X F.S |
Recording frequency | 1～5760分钟minutes |
Temperature measurement range | -40～125℃ |
Temperature resolution | 0.05℃ |
Temperature sensor accuracy | ±0.5℃（-20～85℃） |
Internal battery life | 10 years (record 1 time / 60 minutes) |
storage volume | >50000 records (water level + water temperature + pressure + battery voltage + time) |
Real Time Clock | <±5 minutes/year |
Temperature characteristics | |
Zero temperature coefficient | 0.005％ F·S/℃ |
F.S  temperature coefficient | 0.005％ F·S/℃ |
Compensation temperature | -10～50℃ |
Operating temperature | -20～85℃ |
Storage temperature | -40～125℃ |
Electrical characteristics | |
Supply voltage | External power supply：9～36VDC |
Internal battery：2.7～3.6VDC | |
Communication interface protection | （2KV）Surge voltage |
Load capacity | 128 device addressing nodes |
Output method | RS485 interface，MODBUS-RTU protocol |
Transmission distance | 1km |
Stand-by current | ＜5µA |
Operating current | ＜5mA |
Insulation | 100MΩ @50V |
Mechanical properties | |
Sensor life | 106times full scale pressure cycle |
Material in with liquid | 316L |
Seal ring material | fluororubber |
Housing material | 316L stainless steel (optional titanium alloy) |
Cable material | PVC or PU |
Weight | About 300g |
Environmental characteristics | |
Vibration | 20g  20～5000Hz |
Shock | 20g  11ms |
Protection level | IP68 |
Explosion-proof grade | Exiaâ…¡C T6 |
Air filter protection rating | IP67 |
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Electrical connections
No. | pan> | Definition |
1 | Red | 24V+ |
2 | Blue | RS485+ |
3 | Green | RS485- |
4 | Yellow | GND |
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