Consent Preferences


The T/LL312 series of advanced sensors is designed to continuously monitor the contents of a tank in extreme temperature applications such as defence and off-highway vehicles. Capable of operating at temperatures between -40°C and +125°C, the sensor auto compensates when a liquid with a different dielectric constant is used. For example, if it is used in a tank of conventional diesel, the user can refill with bio-diesel and the sensor will correct the output level automatically.

Options include compensation for non-linear shaped tanks.

Data Sheet

Liquid types

Diesel, biodiesel, kerosene, petrol, water or any liquid which is compatible
with the materials of construction.


Housing: Anodised die cast aluminium.
Sensor tube: Anodised aluminium.
Wetted materials: PTFE, FVMQ, Nylon (PA66), fluorosilicone,
aluminium & stainless steel.


Probe length: Min 150 mm.
Max 1200 mm static applications,
supported in mobile applications for probe lengths greater than 500 mm.


Supply voltage: 9-36 VDC
Supply protection: 80V over voltage & reverse polarity protection.
Supply current: 15 mA@12 VDC + output load.
Connections: Military connector; D38999/20WA98PN.


Current: 0-20 mA, 4-20 mA.
Resolution: 20 μA.
Max load: 250 Ω (Including interconnecting cable resistance).
Accuracy: ±2.0% of probe length @ 20 ºC in diesel.

Environmental Ratings

Designed to meet:
Operating Temperature: -40 ºC to +125 ºC.
Sealing: IP67.
Weight: 300 g (1000 mm long unit).
Max tank pressure: 1.7 bar (25 psi).
EMC: Type approval in accordance with EN ISO 13766:2006.
Vibration: 500 mm sensor type tested to 1.88 grms to BS EN 60068-2-64:1993*.
Shock: 500 ms-2, 11 ms to BS EN 60068-2-27:1993.


Custom empty/full points: Specific full levels can be provided within the allowable measurement range of the probe.
Non-linear Tanks: Compensation for non-linear tank shapes available.

Product Inquiry - T/LL312