HR8800 Intelligent Temperature And Water Level Recorder

HR8800 Intelligent Temperature And Water Level Recorder

HR8800 Water level recorder is a groundwater monitoring instrument which can be either external powered or internal battery self-powered it is used for the long-term recording of the depth (pressure) and the temperature The transmitter contains the water level and temperature sensor built-in large capacity non-volatile memory and high capacity long-life lithium battery it ‘s entire stainless steel structure enables all functions are integrated inside a metal casing with the size of 24mm diameter it applies to measure the surface water groundwater as well as the water level of marine environment. Using the ultra low power technology it’s internal battery can be used for about 10 years it provides RS-485 interface and MODBUS-RUT communication protocol.

1. Overview

HR8800 Water level recorder is a groundwater monitoring instrument which can be either external powered or internal battery self-powered it is used for the long-term recording of the depth (pressure) and the temperature The transmitter contains the water level and temperature sensor built-in large capacity non-volatile memory and high capacity long-life lithium battery it’s entire stainless steel structure enables all functions are integrated inside a metal casing with the size of 24mm diameter it applies to measure the surface water groundwater as well as the water level of marine environment. Using the ultra low power technology it’s internal battery can be used for about 10 years it provides RS-485 interface and MODBUS-RUT communication protocol.

2. Features

þGroundwater/unmanned hydro-logical sites/flood warning system/city flood control system

þExcellent long-term stability of the sensor element .

þHigh precision with an accuracy of up to 0.05% F.S .

þTemperature measurement capability with a resolution of 0.05℃ .

þFull-scale digital calibration with comprehensive temperature compensation.

þStrong overload capacity

þWide power supply range from 5-30VDC .

þCommunication compatibility with RS485 standard MODBUS-RTU protocol, suitable for integration with DCS or PLC systems .

þInternal memory for storage and logging of more than 30,000 records.

þLow power consumption with standby current less than 5uA.

þProtection against power reverse connection and surge voltage .

þFully sealed stainless steel (or titanium) housing structure with IP68 protection

3. Technical Parameters

Main performance specification
Water level range	0～10 ~ 300mH2O
Water level range	User can specify range and factory calibrate
Accuracy	±0.05％F.S　@20℃
Resolution	0.005％F.S
Long-term stability	＜±0.05%F.S/(Year)
Long-term stability	＜±0.05%F.S/(Year)
Overload capacity	＞2X F.S
Recording frequency	1 minute～99 hours
Temperature measuring range	-40～125℃
Temperature resolution	0.05℃
Accuracy of temperature sensor	±0.25 ℃（-10～100℃）
Internal battery life	10years (Record once /60 minutes)
Storage Capacity	＞50000 sets data
Real Time Clock	＜±5minutes/year
Temperature characteristics
Temperature Effect on Zero	0.005％ F·S/℃
Temperature Coefficient of Full Scale Span	0.005％ F·S/℃
Compensation temperature	-10～80℃
Working Temperature	-20～85℃
Storage Temperature	-40～125℃
Electrical Properties
Supply voltage	External power：5～30VDC
Supply voltage	Internal power：2.7～3.6VDC
Communication interface protection	（2KV）surge voltage
Load capability	128 device addressing nodes
Output	RS485 interface
Output	MODBUS-RTU protocol
Transmission distance	1km
Standby Current	＜5µA
Working current	＜5mA
Insulation	100MΩ @50V
Mechanical properties
Sensor life	＞106
Sensor life	Times of full scale pressure cycle
Wetted material	316L
Sealing ring material	Fluororubber
Shell material	316L stainless steel
Shell material	(optional titanium alloy)
Cable material	Polyethylene
Weight	About 300g
Environmental characteristics
Vibration	20g 20～5000Hz
Impact	20g 11ms
Protection Class	IP68