DB308 type deep/underground liquid level gauge (pressure gauge)

Product Features	Adopting imported high-quality silicon piezoresistive sensors, integrated compact structure, dedicated deepwater sealing technology process, ultra long
	Deep well design (2000m) with analog or digital signal output, high measurement accuracy (0.05%), stable and reliable performance,
	Suitable for oil, natural gas, coalbed methane extraction, geological exploration monitoring, and mine water level measurement

Working principle	The pressure sensor probe is placed in the measured liquid and subjected to a certain static pressure of the medium (P). This pressure is related to the measured liquid
	The liquid level height (h, m) of the body is proportional to P=ρ gh (Pa), where ρ is the specific gravity of the medium (g/cm3) and g is
	The local gravitational acceleration (m/s2) is constant for the measured medium and location, where ρ and g are constant. The electronic components of the transmitter will apply pressure
	The liquid level pressure signal measured by the force sensor is transmitted to the display instrument, and the liquid level signal of the medium is displayed through circuit conversion.

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Technical Parameter	·Measurement range	Minimum 0~350m, maximum 0~2000m
	·Measurement accuracy	(Comprehensive errors include linearity, hysteresis, and repeatability)
		Simulated 0.2% FS; Intelligent 0.2% FS, 0.1% FS, 0.5% FS
	·Long term stability	Better than 0.03% per year
	·Allowable medium temperature	-20℃~90℃
	·Allow ambient temperature	-40℃~85℃
	·Allow storage temperature	-40℃~85℃
	·Temperature influence	0.2%, 0.1%, 0.075% accuracy level -20 ℃~80 ℃, every 10K+0.1%, other temperature ranges every 10K ± 0.2%
		0.05% accuracy level, every 10K ± 0.02%
	·Material of the part in contact with the medium
	·silicon piezoresistive sensor	Corrugated film 316L (special requirements agreed upon)
	·Measuring sensor housing	Stainless steel 316L
	·Invest in extension cables	Plastic PE
	·Sensor counterweight	Stainless steel 304 (special requirements agreed upon)
	·Material of non-contact parts with the medium
	·Junction box	ABS plastic IP66/IP67
	·Process Connection Standard	Nickel plating on carbon steel
	·Working voltage	（12.5~30V DC）
	·Signal output	Analog type: 2-wire system 4-20mA
		Intelligent two-wire 4-20mA with HART communication protocol
	·Cable entry hole	Internal thread M20 × 1.5 (PVC junction box)
	·Analog cable	Three core instrument cable intelligent cable: It is recommended to use shielded twisted pair cable for wiring
	·Allow environmental humidity	100%HR

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Exterior structure

Electrical connection

load characteristics

Communication protocol

DB series intelligent liquid level gauge with remote communication function

Overlay a digital signal on the 4-20mA two-wire output signal of the level gauge transmitter to achieve the HART communication protocol standard

Several functions. The functional implementation includes the following: manual operation using the HART communication protocol or a microcomputer (requires configuration)

The HART communication protocol software interface can remotely calibrate the zero point and full range values of the liquid level transmitter, display the temperature value of the medium, and indicate whether it has been used

Pressure level value, adjust damping value, achieve self diagnostic function of the measurement system, display various fault states represented by fault codes

Location and reason.

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