250 Series
Provides fast, reliable detection of ferrous metals through all non-ferrous materials with high precision.
The 250 Series Ferrous Metal Proximity Sensors deliver highly precise, localized detection of ferrous metals through non-ferrous materials like aluminum, air, or water, with an ideal sensing distance of 0.07 - 0.9 inches for standard ferrous targets.
Output options include analog-only voltage or a combination of digital and analog signals, allowing for versatile integration into various systems.
Available in multiple configurations, the series includes our standard A75Q housing and the AFM model—a 90-degree flange-mount housing with four flexible mounting positions.
Features
True Zero Speed
No moving parts to fail
0.9"
Large Detection Gap
Ideal detection gap of 0.07 - 0.9 inches
Internal Hysteresis
False trigger immunity for signal integrity
Durable
Vibration, corrosion, and mechanical shock tested
Supply Voltage
Operates between 7 - 30 Volts DC
Voltage output range
Produces 1 - 12 Volt DC Output
Detects through non-ferrous materials
Easy detection through aluminum, titanium and other non-ferrous meterials
High-temperature resilliance
0 to 70 - degree C operational range
Electrical Options
Analog Only
Our Analog Output sensors generate a baseline voltage of 1 V in the absence of a ferrous metal target. As a target approaches the sensor face, the output voltage increases proportionally. The magnitude of this increase is dependent on both the size of the target and its proximity to the sensing face—larger and closer targets yield higher output voltages.
Analog Sensing Range:
.05 - 1.3 Inches
Ideal Sensing Range:
.07 - 0.9 Inches
Our smallest analog sensors provide detection over the smallest distance – .05″ to 1.3″ from a large steel plate – offering more precise detection of a target with other ferrous metals nearby.
Analog and Digital
Our Digital Output Sensors feature an additional discrete switched-transistor digital output. When a ferrous target approaches the sensor face and exceeds a defined threshold, the digital output changes state. This trigger point is user-adjustable across a configurable detection range, allowing for application-specific sensitivity tuning.
Standard Trigger Distance:
0.35 Inches
Digital Options:
Our digital output sensors have an additional option of an NPN or PNP output.
NPN (3K pull-up resistor)
Our NPN digital output starts HIGH- approximately 11.8 Volts DC at a supply voltage of 12 Volts - with no target present. At a gap of 0.35 inches, the discrete digital signal switches LOW - approximately 1 volt.
PNP (Open Collector)
Our open-collector PNP digital output starts LOW- approximately 11.8 Volts DC at a supply voltage of 12 Volts - with no target present, mirroring the analog output. At a gap of 0.35 inches, the discrete digital signal switches HIGH - approximately 1 volt, the opposite of the NPN version.
Housing Options
A75Q Housing
Our 250 Series come standard in our A75Q housing.
Al
Anodized Aluminum
Enclosure
NEMA, 1,3,4,6 &IEC IP67
35ft-lbs
Max installation torque
Vibration
10 G's 2 to 2K Hz Sinusoidal
Mechanical Shock
100 G's, 11mS Half-Sine
Corrosion Resistance
500 hours salt spray ASTM B-117
AFM Flange-Mount
We offer a 90-degree flange mount housing as an alternative to our A75Q housing for increased application flexibility.
Al
Anodized Aluminum
<1 in-lb
Max installation torque
Mechanical Shock
100 G's, 11mS Half-Sine
Enclosure
NEMA, 1,3,4,6 &IEC IP67
Vibration
10 G's 2 to 2K Hz Sinusoidal
Corrosion Resistance
500 hours salt spray ASTM B-117
