T/LL350 Capacitance Liquid Level Sensor Extended Low Temp Range
Vertically mounted liquid level sensor with auto-compensation for changes in the liquid’s dielectric. Mounting options include taper thread or SAE 5-hole flange. Choice between current, resistance or voltage electrical outputs.
The T/LL350 series is a range of highly advanced sensors for continuously measuring the contents of a tank. The unique feature of the T/LL350 is that it auto compensates when a liquid with a different dielectric constant is used. For example, if it is used in a tank of conventional diesel, then the user can refill with bio-diesel and the sensor will correct the output level automatically. Options include a high/low level alarm point, fitment of any suitable connector and compensation for non-linear shaped tanks.
Documents
Data Sheet
Liquid Types
Diesel, biodiesel, kerosene, petrol, water or any liquid which is compatible with the materials of construction.
Construction
Housing: Die cast aluminium & stainless steel
Sensor tube: Anodised aluminium
Wetted materials: PTFE, polypropylene, FVMQ, fluorosilicone, aluminium & stainless steel
Dimensions
Probe length: Min 150mm
Max 2000mm static applications &
1000mm for mobile applications
Outputs
Resistive: Any values between 3-500Ω or 500-3Ω (3Ω Steps)
Resolution: 3Ω
Max dissipation: 250mW
Current: 0-20mA, 4-20mA
Resolution: 20μA
Max load: 250Ω (Including interconnecting cable resistance)
Voltage:
12VDC system: Any values between 0-5V/5-0V
24VDC system: Any values between 0-10V/10-0V
Resolution: 10mV
Max Load: 10mA source (dependent on minimum supply voltage)
Accuracy: ±2.0% of probe length @ 20ºC (+68ºF) in diesel (For probes lengths 300mm and above)
Environmental Ratings
Operating Temperature: -40ºC to +85ºC (-40ºF to +185ºF)
Sealing: IP67
Weight: 300g (10oz) (1000mm long unit)
Max tank pressure: 0.75 bar (10 psi)
EMC: Type approval in accordance with EN ISO 13766:2006
Vibration: 500mm sensor type tested to1.88grms to BS EN 60068-2-64:1993*
Shock: 500ms-2, 11ms to BS EN 60068-2-27:1993
Options
Alarm: One position at either high level (switch to ground above level) or low level (switch to ground below level). Switch point can be set between 7% and 90% of measuring range (hysteresis 5%). Max load: 100mA.
Custom empty/full points: Specific empty and full levels can be provided within the allowable measurement range of the probe.
Non-linear Tanks: Compensation for non-linear tank shapes available.
#Connections: Any suitable customer specified connector can be fitted. Terminated wire ends should be fitted with suitably sealed connectors to maintain specified IP rating.
Ŧ Due to 3Ω resolution, accuracy of resistive output variants is specified accuracy ±3Ω.
