EGE Elektronik Air Flow Sensor Productseries LC 521 GA-Ex22

Description

The EGE Elektronik LC 521 GA-Ex22 is the authoritative solution for monitoring airflow in environments where combustible dust creates a localized explosion risk. Certified to ATEX Category 3D, this sensor is specifically engineered for Zone 22, allowing for safe operation in industrial facilities such as grain elevators, woodworking plants, and chemical processing units without requiring an external intrinsically safe barrier. Unlike mechanical vane switches, the LC 521 GA-Ex22 is a thermal (calorimetric) monitor. It functions by measuring the cooling effect of the moving air on a heated sensor tip. This solid-state design is a critical advantage in dusty environments; because there are no moving parts, the sensor cannot be jammed, clogged, or worn down by airborne particulates.

Brand

EGE-Elektronik

EGE-Elektronik Spezial-Sensoren GmbH has been developing and manufacturing special purpose sensors for automation applications since 1976. The company serves leading international producers from a wide range of industries. Its product portfolio includes flow controllers, infrared, opto and ultrasonic sensors, capacitive proximity switches, light barriers and inductive proximity switches. EGE also provides sensors for highly sensitive applications, e. g. hazardous areas. The development department`s highly qualified staff cooperates closely with all customers, ensuring continuous product updates and enhancement.

EGE has been a pioneer in the field of flow controller and an innovator and decisive participant in the development of today's globally utilized thermal flow controllers. The in-house EMC and test laboratories ensure that all inspections and tests required for permits and conformity certificates are carried out quickly and reliably. Product quality is guaranteed with a continuously monitored quality management system in accordance with EN ISO 9001:2000.

Specifications

TYPE	LC 521 GA-Ex22
Product ID	P11422
Thread/sleeve	G1/2
Medium	gaseous media
Detection range air	0.5 … 20 m/s
Sensor length L	32 mm
Output	analog output 4…20 mA
Output function	non linear
Supply voltage	24 V DC +/- 10 %
Current consumption max.	35 mA
Ex area uf use	Zone 2, Zone 22
Certificate of conformity	EGE 21.0010 X
ATEX marking gas	Ex II 3 G Ex ic mc IIC T4…T3 Gc
Ex Marking ATEX Dust	Ex II 3 D Ex ic mc IIIC T135 °C Dc
Temperature range in T4	-10 … 60 °C
Temperature range in T3	-10 … 60 °C
Temperature range dust-Ex	-10 … 60 °C
Start-up time typ.	20 s
Reaction time typ.	5 s
Compressive strength	1 bar
Material housing	stainless steel AISI 316 Ti, ceramics, PBT-GF30, PUR
Display flow	2-colour-illuminated dot red / green
Protection [EN 60529]	IP 67
Electrical connection	2 m PUR-cable 3×0.5 mm²

Features

Integrated Evaluation Logic: No external amplifier required; easy “Plug & Play” installation.
Stainless Steel (V4A) Housing: Provides high durability and resistance to abrasion from airborne particles.
LED Trend Display: Visual indicators show the current flow status relative to the setpoint at a glance.
Adjustable Sensitivity: Fine-tune the switching point for air velocities ranging from 0.5 to 20 m/s.

Applications

Agricultural Silos: Ensuring constant air circulation to prevent heat buildup in grain storage.
Textile Manufacturing: Supervising airflow in areas prone to lint and fiber dust.
Pneumatic Conveying: Monitoring the transport of powders or granules to prevent line blockages.
Filter Supervision: Detecting reduced airflow caused by clogged dust filters in hazardous zones.