Namur valves for 2-, 3-, and 4-way systems. Electrically or pneumatically operated for precise flow control in hydraulic and pneumatic applications.
Limit switch box Switchmaster SM-M2 D2, N2 for butterfly and ball valves. Supplied assembled with pneumatic actuator and Namur valve, fully tested.
Pneumatic actuators, single-acting and double-acting. FERGO DA & SR series for industrial valves, reliable, robust, and application-ready.
Armaturen aus dem Hause FERGO! Armaturen automatisch steuern? kein Problem! Unsere Kugelhähne und Absperrklappen lassen sich über einen Antrieb extern steuern. Egal ob Sie eine pneumatischen Steuerung (einfa
IFM IN 5327 Induktiver Doppelsensor electronic for Schwenkantriebe
Product number
Copy to clipboard 710-1100
The actuator is designed for the reliable automation of industrial valves. Materials and seals: Rectangular housing; PBT housing. Further features: IFM IN5327 inductive dual sensor for rotary actuators; rectangular housing; switching distance 4 mm; cannot be flush-mounted. The design ensures safe operation, easy integration and reliable performance in everyday industrial use. Suitable for the automation of Ball Valves, Butterfly Valves and other industrial valves in plant engineering and process automation.
Price €86.59
€103.04 incl. VAT Delivery Time: 2–5 Working Days
Available: In Stock
IFM IFT206 Induktiver Sensor M12 10-36 DC use in der Lebensmittelindustrie
Product number
Copy to clipboard 710-2060
The knife gate valve is designed for the safe shutoff of liquid, slurry or solids-laden media. Type: Thread. Operating data: 0°C to 100°C. Further features: IFT 206 inductive sensor for Pneumatic knife gate valves. Special feature: Increased switching distance; Application: Regular cleaning processes; IFB3004BBPKG/M/V4A/6M/WH. The design ensures safe operation, easy integration and reliable performance in everyday industrial use. Suitable for wastewater, sludge, bulk materials, the paper industry, sewage treatment plants and process lines carrying media containing solids.
Price €69.45
€82.65 incl. VAT Delivery Time: 2–5 Working Days
Available: In Stock
IFM NN 5008 Induktiver Doppelsensor electronic for Schwenkantriebe ATEX
Product number
Copy to clipboard 710-1103
The actuator is designed for the reliable automation of industrial valves. Approvals and standards: ATEX. Further features: ATEX - Marking: Ex ia; Electric version: NAMUR; Output function: 2x normally closed contacts; Switching distance: 4 mm. The design ensures safe operation, easy integration and reliable performance in everyday industrial use. Suitable for the automation of Ball Valves, Butterfly Valves and other industrial valves in plant engineering and process automation.
Price €71.10
€84.61 incl. VAT Delivery Time: 2–5 Working Days
Available: In Stock
IFM IN 5334 Induktiver Doppelsensor Aktuatoranschaltung electronic for Schwenkantriebe IP67
Product number
Copy to clipboard 710-1101
The actuator is designed for the reliable automation of industrial valves. Materials and seals: PC. Indicator: 2x LED; yellow (switch status); Ambient temperature: -25°C to +80°C; Protection class: IP67. Further features: IFM IN5334 dual sensor with actuator connection; housing: rectangular; switching distance: 4 mm; not flush-mounted. The design ensures safe operation, easy integration and reliable performance in everyday industrial use. Suitable for the automation of Ball Valves, Butterfly Valves and other industrial valves in plant engineering and process automation.
Price €196.33
€233.63 incl. VAT Delivery Time: 2–5 Working Days
Available: In Stock
IFM IN 5225 Induktiver Doppelsensor electronic for Schwenkantriebe
Product number
Copy to clipboard 710-1102
The actuator is designed for the reliable automation of industrial valves. Materials and seals: Rectangular housing; PBT housing. Further features: IFM IN5225 inductive dual sensor; rectangular housing; switching distance 4 mm; cannot be flush-mounted. The design ensures safe operation, easy integration and reliable performance in everyday industrial use. Suitable for the automation of Ball Valves, Butterfly Valves and other industrial valves in plant engineering and process automation.
Price €80.08
€95.30 incl. VAT Delivery Time: 2–5 Working Days
Available: In Stock
Frequently Asked Questions – Inductive Sensors for Part-Turn Actuators
An inductive sensor for part-turn actuators is a non-contact proximity switch that detects the end position of an automated valve (OPEN / CLOSED) without any mechanical contact and reports it as an electrical signal to the control system (PLC/DCS). The operating principle:
- Inductive effect: A coil inside the sensor head generates a high-frequency alternating electromagnetic field. When a metallic object (the cam disc on the actuator or a dedicated target flag) enters the sensing field, it damps the oscillating circuit – the sensor switches contactlessly to its active or inactive state
- Dual sensor: Most FERGO variants (IN5225, IN5327, IN5334, NN5008) are designed as dual sensors – two switching elements in one housing for simultaneous detection of both end positions (OPEN and CLOSED) with a single device
- Contactless operation: No mechanical contact between sensor and actuating element → no wear, no contact corrosion, no arcing; virtually unlimited switching life
- Self-cleaning: Since there are no moving parts in the sensing zone, dirt, dust, or liquid cannot settle on critical contact surfaces
- Output signal: Depending on model: PNP transistor output (10–36V DC, NO contact) or NAMUR current signal (7.5–15V DC, 2-wire, for Ex ia intrinsic safety)
FERGO stocks five IFM sensor models covering different mounting requirements, switching principles, and protection ratings:
IFM IN5225 – Inductive dual sensor, PNP, standard:
IFM IN5225 – Inductive dual sensor, PNP, standard:
- Housing: cuboid PBT; switching distance: 4mm, non-flush; electrical version: PNP, 3-wire; operating voltage: 10–36V DC; output: 2× NO; connector: 1× M12; protection: IP67; temperature: −25°C to +80°C; contacts: gold-plated
- Use: Standard part-turn actuators; 24V DC PLC systems; M12 fieldbus connector plants
- Identical core data to IN5225 (cuboid PBT, 4mm, PNP, 10–36V DC, 2× NO, M12, IP67, −25°C to +80°C, gold contacts, 2× yellow LED); current production model with LED status indicator; current consumption 15mA at 24V
- Use: Preferred standard choice for all new installations; ball valves, butterfly valves, plug valves with pneumatic or electric part-turn actuator
- Housing: cuboid PBT/PC; switching distance: 4mm, non-flush; PNP; 10–36V DC; current consumption: 20mA at 36V; 2× NO; connectors: Rd24×1/8, 6-pin + M12, 5-pin; mounting per ISO 5211 / VDI/VDE 3845; protection: IP67; temperature: −25°C to +80°C
- Use: Direct mounting to ISO 5211 hole pattern without adapter plate; plants with Rd24 device connector on actuator; 3-screw quick installation; preferred for new installations with an integrated ISO 5211 automation concept
- Housing: cuboid PBT/PC; switching distance: 4mm, non-flush; electrical version: NAMUR, 2-wire; nominal voltage: 8.2V DC (1kΩ); supply: 7.5–15V DC; output current: blocked <1mA, conducting >2.1mA; connector: 1× M12; protection: IP67; temperature: −20°C to +80°C
- ATEX: Ex ia; intrinsic safety limits: U=15V / I=50mA / P=120mW; Li=130μH; Ci=140nF; Category II 1G/2G + 1D; suitable for Zone 1, 2, 21, 22
- Use: All hazardous areas; ATEX Zone 1 gas and Zone 21 dust; evaluation via NAMUR Zener barrier or galvanic isolator; NAMUR-compatible PLC input evaluation
- Housing: threaded type M12×1, L=50mm, stainless steel thread; switching distance: 4mm, flush-mountable; PNP, NO; operating voltage: 10–36V DC; current consumption: 10mA at 24V; cable: 6m fixed; protection: IP68 + IP69K (COP-rated – Cleaning-Out-of-Place with high-pressure steam jet); temperature: 0°C to +100°C
- Characteristic: Increased sensing range; flush-mountable; designed for regular cleaning processes (CIP/COP)
- Use:Knife gate valves (linear stroke, one IFT206 per end position OPEN and CLOSED); food, beverage, and pharmaceutical plants with high-pressure cleaning; applications with heavy contamination and moisture; wherever IP67 of standard sensors is insufficient
Both solutions perform the same core function (electrical OPEN/CLOSED position feedback to the PLC), but differ in construction, mounting approach, and optimal use cases:
Inductive sensor (IFM IN5xxx / NN5xxx / IFT206):
Inductive sensor (IFM IN5xxx / NN5xxx / IFT206):
- Mounting: Directly on the actuator housing or ISO 5211 hole pattern; most compact solution; no separate housing with cam shaft required
- Actuating element: Cam disc on the actuator or dedicated target flag; contactless switching
- Wear: No mechanical wear; virtually unlimited service life with correct installation
- Visual indicator: LED status indicator on the sensor only (visible at short range); no large-format position display like the Switchmaster
- ATEX suitability: NN5008 for Zone 1/21 (Ex ia); IFT206 for non-ATEX areas with high-pressure cleaning
- Preferred for: Plants with a uniform inductive sensor concept throughout; IO-Link-capable PLC systems; high switching frequency; space-saving requirements; food/pharma (IFT206)
- Mounting: On NAMUR hole pattern of actuator; own housing with adjustable cam shaft (0–90°)
- Actuating element: Internal cam disc, mechanically adjustable → precise switching point setting possible in the installed state
- Visual indicator: Large-format, clearly visible red/green position display bar – readable from several metres; ideal for site walks and commissioning
- Switching principle: Mechanical (M2: microswitch, 4V–250V AC, change-over), inductive PNP (D2), or NAMUR (N2, ATEX)
- Preferred for: Requirement for a clearly visible position indicator; wide voltage range (mechanical up to 250V AC); change-over contacts (NO + NC in one device); straightforward field adjustment of switching points
PNP and NAMUR describe two fundamentally different output principles for inductive sensors:
PNP sensor (IN5225, IN5327, IN5334, IFT206):
PNP sensor (IN5225, IN5327, IN5334, IFT206):
- Output: Transistor output (PNP); in the active state, the sensor connects the positive supply rail to the output pin (normally open / NO)
- Voltage: 10–36V DC; typically 24V DC in PLC installations; output pin supplies up to 100–200mA directly into the PLC input terminal
- Connection: 3-wire (V+, output, GND); direct connection to PLC PNP digital input; no evaluation unit required
- ATEX: Standard PNP sensors are not intrinsically safe; they can be used in Zone 2/22 with a suitable Ex enclosure (Ex e, Ex d), but not in Zone 1/21 without an intrinsic safety concept
- When to use: All standard 24V DC PLC installations without ATEX Zone 1/21 requirement
- Output: 2-wire current signal per EN 60947-5-6; no transistor output; the sensor modulates its own quiescent current: undamped (no metal in field): >2.1mA (switch open) / damped (metal in field): <1mA (switch closed)
- Voltage: Nominal 8.2V DC; supply range 7.5–15V DC; from certified intrinsically safe circuit (Zener barrier or galvanic isolator)
- Connection: 2-wire; evaluation via NAMUR-compatible evaluation unit or PLC NAMUR input card; evaluation unit generates the 24V DC PLC-compatible digital signal
- ATEX:Ex ia – intrinsic safety; since all energy stored in the sensor (Li ≤130μH, Ci ≤140nF) and the maximum operating energy (U ≤15V, I ≤50mA, P ≤120mW) are well below the ignition limits for gas group IIC, the sensor can be used in Zone 1 and Zone 21
- When to use: All ATEX Zone 1 (gas) and Zone 21 (dust); plants with NAMUR signal circuits and Ex ia supply
The IFM IFT206 is a single inductive sensor in a stainless steel M12×1 threaded housing, specifically designed for applications with regular cleaning processes and extreme moisture exposure – and the preferred sensor for knife gate valves and slide gates in the FERGO range:
Technical features compared to the dual sensors (IN5xxx):
Technical features compared to the dual sensors (IN5xxx):
- Housing form: Threaded type M12×1, 50mm length (cylindrical, flush-mountable) – can be fully recessed into a bore so that no part protrudes above the mounting surface; significantly more resistant to mechanical damage than cuboid housings
- Flush-mountable: No lateral shielding of the sensing face required; more flexible installation in confined spaces
- Protection class IP68: Submersion-proof (pressure water resistance beyond the IP67 rating); the sensor withstands continuous immersion depth and pressurised water ingress
- Protection class IP69K: COP-rated (Cleaning Out of Place); the sensor withstands high-pressure steam jets up to approx. 80°C at 80 bar from 10–15cm distance – the most severe cleaning condition in food processing plants
- Temperature range 0°C to +100°C: Suitable for hot water and steam cleaning processes (the PBT housing variants of the IN5xxx dual sensors are limited to +80°C)
- Stainless steel M12×1 thread: Corrosion-resistant; EHEDG-compliant for food contact areas; cleaning-optimised surface
- Connection: 6m fixed cable (no connector – no additional leak point)
Mounting the FERGO inductive sensors varies in effort depending on the model:
IN5334 (actuator connection, ISO 5211 / VDI/VDE 3845 mounting) – fastest installation:
IN5334 (actuator connection, ISO 5211 / VDI/VDE 3845 mounting) – fastest installation:
- Direct mounting to the ISO 5211 / NAMUR hole pattern of the actuator with 3 screws; the Rd24×1/8 connector on the actuator accepts the 6-pin plug of the sensor; M12 connector for the PLC signal cable
- The target flags or cams on the actuator are mechanically fixed to the ISO 5211 mounting plate – no separate switching point adjustment required; end positions are determined by the actuator geometry
- Commissioning: Mount sensor → apply supply voltage → check LED status in OPEN and CLOSED end positions → complete
- Mounting via suitable bracket on the actuator or on the limit switch box mounting plate; sensing distance to actuating element (cam disc): 0–4mm (non-flush → no lateral metallic influence on the sensing field)
- Switching points are set by positioning the cam disc on the actuator; 2× yellow LED on the sensor shows active switching state – visual aid during adjustment without test equipment
- Screw into M12 threaded bore in the valve body or gate housing; flush-mountable → sensor face can be flush with the mounting surface; sensing distance 4mm to the actuating element (typically metal cam or gate plate)
- No connector – 6m cable directly on the sensor; secure against rotation when screwing in
Signal evaluation for FERGO inductive sensors depends on the output principle:
PNP sensors (IN5225, IN5327, IN5334, IFT206) – direct PLC wiring:
PNP sensors (IN5225, IN5327, IN5334, IFT206) – direct PLC wiring:
- Supply: 24V DC from PLC power supply or terminal supply (terminals: V+, GND, Output 1 NO, Output 2 NO for dual sensors)
- PLC input (PNP/source): Sensor switches 24V DC onto the input pin when the switching distance to the actuating element is reached (end position achieved) → PLC input ="1" / HIGH
- Typical PLC assignment:
- Output 1 → "valve OPEN confirmed" (when cam disc in OPEN end position actuates the sensor)
- Output 2 → "valve CLOSED confirmed" (when cam disc in CLOSED end position actuates the sensor)
- Stroke time monitoring: PLC starts timer with positioning command; if position confirmation does not arrive within the set stroke time → alarm "stroke monitoring" or stroke time fault
- Zener barrier or galvanic isolator (in the control cabinet outside the hazardous area) supplies the NAMUR sensor with 8V DC and evaluates the return current: conducting (>2.1mA) = not actuated; blocked (<1mA) = actuated (end position reached)
- Barrier/isolator output: 24V DC PNP or potential-free relay contact → direct connection to standard PLC digital input
- Additional function: NAMUR evaluation units detect cable break (current = 0mA) and short circuit (current >>3mA) as wire-break alarm / short-circuit alarm – higher diagnostic capability than PNP sensor
Yes – IFM inductive sensors can be integrated into the FERGO automation package as an alternative to the limit switch box (Switchmaster) and are factory-mounted and set on the actuator. The typical configuration:
- Process valve (butterfly valve, ball valve, knife gate valve etc.)
- Pneumatic part-turn actuator (DA or SA), ISO 5211 mounting
- NAMUR solenoid valve (3/2 or 5/2)
- Inductive sensor (IFM IN5334 direct to ISO 5211; or IN5327 on bracket; or NN5008 for ATEX installations)
- Switching points factory-set to the actuator geometry and documented
- Cable harness (sensor → M12 connector on actuator) pre-assembled; only the system cable needs to be plugged in on site
- For ATEX packages: NN5008 with ATEX documentation and Ex ia cables pre-assembled; matching Zener barriers available on request
- More space-saving than limit switch box solution: no additional housing on the actuator; ideal for confined installation situations