EGE Elektronik Sensor with Integrated Amplifier Productseries STK 421 KH-A4

Description

The EGE Elektronik Sensors with Integrated Amplifier Productseries STK 421 KH-A4 is the authoritative choice for engineers who need to monitor flow in high-temperature systems where space is limited. The “KH” designation indicates that the sensor is equipped with enhanced thermal resistance, allowing it to operate continuously in media temperatures reaching 100°C, exceeding the capabilities of standard integrated sensors.

The “STK” shortened housing is specifically designed for integration into manifold blocks and machine frames. Despite its compact size, the evaluation electronics are housed directly within the sensor head, delivering a decentralized control solution that eliminates the need for external rail-mounted amplifiers.

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	STK 421 KH-A4
Product ID	P10436
Medium	water, oil
Detection range water	1 … 150 cm/s
Detection range Oil	3 … 300 cm/s
Process connection	G1/2
Sensor length L	31 mm
Ambient temperature	10 … 120 °C
Medium temperature	10 … 120 °C
Temperature gradient fluids	250 K/min
Start-up time typ.	8 s (2 … 15 s)
Reaction time typ.	2 s (1 … 13 s)
Compressive strength	100 bar
Material sensor touched by medium	stainless steel AISI 316 Ti
Material housing	stainless steel AISI 316 Ti, brass
Protection [EN 60529]	IP 68
Electrical connection	2 m FEP-cable 4×0.25 mm²
Accessories (in scope of delivery)	2 x gasket G1/2 AFM 34
Associated amplifiers	SKM 420 GR, SKM 420 GSP, SKM 420 GA, SKM 522 GR, SKM 522 WR, SKZ 400 GR, SKZ 400 WR-115, SKZ 400 WR

Features

Integrated Evaluation Amplifier: Simplifies electrical design by providing a direct PNP signal from the sensor head.
Thermodynamic Measurement: Solid-state design with no moving parts ensures a maintenance-free life cycle.
Premium V4A Stainless Steel: 1.4571 high-grade material for superior corrosion and chemical resistance.

Applications

Mold Temperature Control: Monitoring hot water flow in injection molding processes to ensure consistent cooling/heating.
Industrial Heat Exchangers: Verifying flow in secondary circuits where temperatures exceed standard 80°C limits.
Thermal Oil Systems: Monitoring the circulation of heat-transfer oils in compact heater units.