EGE Elektronik Sensor Air Flow Sensors Productseries LTZ 421 S-A2

Description

The EGE Elektronik LTZ 421 S-A2 is the authoritative choice for engineers who require a compact airflow monitoring solution that operates on mains power but offers the modern convenience of modular cabling. The “LTZ” series is characterized by its streamlined footprint, making it ideal for installation in air-conditioned control cabinets, small-bore ventilation ducts, and high-density equipment racks. The “A2” designation indicates the 230V AC power supply, while the Relay output provides a potential-free contact capable of switching both AC and DC loads. This allows the sensor to act as a direct safety interlock—triggering alarms or shutting down heaters if airflow is lost—without requiring additional signal amplifiers or DC power supplies.

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	LTZ 421 S-A2
Product ID	P11101
Medium	air, non-explosive gas
Detection range air	0.5 … 30 m/s
Process connection	G1/2
Sensor length L	48 mm
Ambient temperature	-20 … 80 °C
Medium temperature	-20 … 80 °C
Temperature gradient gaseous media	20 K/min
Start-up time	10 … 90 s
Reaction time	2 … 30 s
Compressive strength	30 bar
Material sensor touched by medium	stainless steel AISI 303
Material housing	stainless steel AISI 303, brass, PA
Protection [EN 60529]	IP 67
Electrical connection	M12 connector
Accessories	connecting cable SLG 4-2, SLG 4-5, SLW 4-2, SLW 4-5
Accessories (in scope of delivery)	2 x gasket G1/2 AFM 34
Associated amplifiers	SKM 421 GR, SKM 421 GSP, SKM 420 GA, SKM 522 GR, SKM 522 WR, SKZ 400 GR, SKZ 400 WR-115, SKZ 400 WR

Features

Modular M12 Connection (-S): Simplifies wiring and enables rapid sensor replacement without disturbing fixed electrical runs.
Potential-Free Relay Output: A versatile switching contact suitable for signaling PLCs or controlling external loads.
Compact LTZ Housing: Space-efficient design optimized for restricted mounting areas in cabinets and machinery.

Applications

Safety Interlocks: Ensuring constant air circulation in industrial ovens or heating chambers before energizing elements.
Fume Extraction: Monitoring air velocity in laboratory hoods where M12 modularity is preferred for easy cleaning/maintenance.
Filter Supervision: Triggering a “Filter Clogged” alarm via relay when airflow drops below the safe threshold.