DB309 Type Input Static Pressure Liquid Level Gauge

Product Features	Adopting imported high-purity ceramic pressure sensors with compact integrated anti clogging flat membrane structure design, superior impact resistance,
	Vibration resistance, extensive anti-corrosion performance, with analog, intelligent, explosion-proof, and various high-precision features
	Grade, highly applicable for measuring liquid levels in sewage, surface water, seawater, and deep mines under harsh conditions.

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.

---

---

Technical Parameter	·Measurement range	Minimum 0~1m, maximum 0~400m
	·Measurement accuracy	(Comprehensive errors include linearity, hysteresis, and repeatability) 0.2% FS, 0.1% FS, 0.05% FS
	·Long term stability	Better than 0.03% per year
	·Allowable medium temperature	-20℃~125℃
	·Allow ambient temperature	-40℃~85℃
	·Allow storage temperature	-40℃~85℃
	·Temperature influence	0.2%, 0.1% accuracy level -20 ℃~80 ℃ per 10K+0.1% for the remaining temperature ranges per 10K ± 0.15%
		0.05% accuracy level, every 10K+0.2%
	·Material of the part in contact with the medium
	·Ceramic capacitor type sensor	96% alumina ceramic or 99% alumina ceramic
	·Probe structure and material	Stainless steel 304 outer diameter d=22mm，Stainless steel 304 outer diameter d=29mm
		Stainless steel 304 outer diameter d=41mm
	·Air conducting cable	Polyurethane rubber PU; Polyethylene PE; Perfluoroethylene propylene FEP; Special requirements agreed upon
	·Sensor counterweight	Stainless steel 304 (special requirements agreed upon)
	·Material of non-contact parts with the medium
	·Sealing ring	Fluororubber; EPDM； Kratz; Special requirements agreed upon
	·Junction box	No junction box; Equipped with PVC junction box
	·Process Connection Standard	No connectors; Equipped with installation card sleeve connectors; External thread G11/2A;
		Flange DN50 PN1.6MPa GB9123-2000; Special requirements agreed upon
	·Working voltage	（12.5~30V DC）
	·Signal output	Analog type: 2-wire system 4-20mA
		Analog two-wire system 4-20mA, with temperature sensor signal output PT100 four wire system
		Intelligent two-wire 4-20mA with HART communication protocol
		Intelligent two-wire 4-20mA with HART communication protocol, temperature sensor signal output PT100 four wire system
	·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
	·Preheating time	Simulated 200ms; Intelligent type: 2s
	·Damping	Analog type: 2s; Intelligent type: 0-40s
	·Electromagnetic compatibility	The radiation immunity of radio frequency electromagnetic fields complies with GB/T17626.3-1998 10V/m and meets Class A standards;
		The conduction impedance of RF field induction complies with GB/T17626.6-1998, U=10V, and meets Class A standards
	·Allow environmental humidity	100%HR

---

---

Exterior structure

Junction box

Electrical connection

Order Selection Table