Two Wire External Liquid Level Meter ( A+E 69L)
The external level meter is a measuring instrument which utilises ultrasonic signals for the precise level control and measurement of liquids. The sensors are attached to the outside of the tank and measurements are made through the tank wall. There is no need to drill holes or to perform any welding to install the sensors.
Since there is no contact between the sensors and the liquid to be measured, the external level meter are ideal for hygienic applications and for the measurement of aggressive media.
External Level Meter Features
--No need to drill holes on the tank, external installation.
--No contact with media, completely non-invasive.
--Applicable for poisonous, corrosive, high pressure, flammable, explosive, volatile, easy leaking liquids, etc.
--High accuracy up to 0.2%FS.
--Unique two wire system, easy for wire connection.
--Non-contact measurement to make it safe and long working life.
--Easy and low cost installation and maintenance.
--Self-diagnosed function to make the meter stable and reliable.
External Level Meter Technical Data
|two wire||four wire|
|Measuring Range||0.2~ 3m,0.3~ 5m,0.4~10m,0.5~15m,0.6~20m,0.7~30m,0.8~50m|
|Dead Zone||above min measuring range, when the level comes to dead zone, it displays DEAD, and output 4mA.|
|Display ||6 digits LCD (m)||6 digits OLED (m)|
|Output||4-20mA with Hart, max load 500Ω||4-20mA with Hart, max load 1000Ω|
|Communication||RS485, Hart, infrared||RS485, Hart, infrared, Modbus, WIFI, Bluetooth, Ethernet|
|Transmitter Amb Temp||-40ºC~+70ºC|
|Sensor Amb Temp||-50ºC~+100ºC,60~330ºC|
|Ex-proof||ExdIICT6, intrinsic safety|
|Supply Voltage||DC24V||DC24V / AC220V|
External Level Meter Application Requirements
1. The liquid meida should only contain a small amount of gaseous or solid content. The tank bottom should be free of or be covered only by a little amount of deposit material.
2. When the media dynamic viscosity is between 10mpaS and 30mpaS, the mearuing range would reduce. When it's greater than 30mpaS, the meter could not be used.
3. Tank Material. The tank should transmit ultrasonic signal well, and no air interlayer if the tank wall is multilayer material. Thickness should be 2-70mm.
All AEAD supplied external level meters are guaranteed in 12 month since delivery.
How to select?
When you are not very clear about how to select an external level meter model, please kindly use following table.
|Range||m||03, 05, 10, 15, 20, 30, 50 (m)|
|Sensor Temperature||G||60 ~ 330ºC|
|C||-50 ~ 100ºC|
|Communication (multi-choice)||R||with RS485|
eg. if you choose A+E69L-AS05GCZ-RHI, that means normal type four wire external level meter, range 5m, accuracy 0.1%FS, sensor temperature -50~100C, supply voltage DC24V, with communication RS485, Hart and infrared.
AEAD Technology is committed to providing the very best external level meter support possible. Our customers have unique service needs, and we offer a variety of service options to support them. For any request, you will either get the answer or have one of our professionals to contact you within 24 hours!
--Telephone troubleshooting and support
--Service and repair
--Extended service contracts
AEAD Technology provides factory certified external level meter repairs, calibrations and re-inspection services for AEAD products. Be aware that we do not provide services for products from other manufacturers. For trainings on ultrasonic flow measurement technology, instrumentation and applications, please contact us for the availability and schedules.