Grounding Verification Sensor

Product Specifications

Technical details and manufacturing context for Grounding Verification Sensor

Definition

The Grounding Verification Sensor is a component used in electrical equipment manufacturing, specifically within safety interlock systems. Its primary function is to continuously monitor and confirm the integrity of electrical grounding connections on industrial machinery. By measuring the electrical resistance between the equipment chassis and earth ground, the sensor ensures that grounding is sufficient and uncompromised. If the resistance exceeds a preset safety threshold, indicating poor grounding, the sensor sends a signal to the interlock system to prevent equipment activation or trigger a shutdown, thereby protecting personnel from electrical shock hazards and supporting compliance with safety standards such as IEC 60364-6. The sensor is housed in a corrosion-resistant stainless steel (316L) enclosure with copper alloy contacts and epoxy encapsulation, ensuring durability in industrial environments. It operates on a 24 V DC supply (with ±10% tolerance) and consumes no more than 2 W. The device features a response time of ≤0.1 seconds to alarm after a ground fault, and its detection resistance threshold is set at ≤10 Ω. It provides a 4–20 mA analog current loop output, conforming to IEC 60381-1, and connects via a 4-pin M12 connector per IEC 61076-2-101. The sensor is designed for a wide operating temperature range of -40 to 85 °C and can be stored at -40 to 105 °C, meeting IEC 60068-2-1/2. With an ingress protection rating of IP67 (IEC 60529), it is dust-tight and protected against immersion. Cable lengths from 2 to 10 meters are available, with weight ranging from 0.5 to 1.2 kg depending on cable length. All specifications are reference values; users must verify model-specific parameters and standards with the legal manufacturer or supplier.

Working Principle

The sensor measures the electrical resistance between the equipment chassis and earth ground using its copper alloy contacts. It compares this resistance against a preset threshold (≤10 Ω). If the resistance exceeds this limit, indicating inadequate grounding, the sensor triggers an alarm within 0.1 seconds. This signal is sent to the interlock system, which then prevents equipment activation or initiates a shutdown procedure. The sensor operates on a 24 V DC supply and outputs a 4–20 mA analog signal proportional to the grounding status. Its stainless steel housing and epoxy encapsulation protect internal components from environmental factors, ensuring reliable operation across the specified temperature range.

Common Materials

Stainless Steel Housing, Copper Alloy Contacts, Epoxy Encapsulation

Technical Parameters

Parameter	Typical range	Notes & selection driver
Detection Resistance Threshold	≤10 Ω	Ground resistance above threshold triggers alarmIEC 60364-6
Response Time	≤0.1 s	Time to alarm after ground fault
Supply Voltage	24 ±10% V DC	Reverse polarity protected
Power Consumption	≤2 W	At nominal voltage
Operating Temperature	-40–85 °C	Extended range for industrial useIEC 60068-2-1/2
Storage Temperature	-40–105 °C	Non-operatingIEC 60068-2-1/2
Ingress Protection	IP67	Dust-tight and protected against immersionIEC 60529
Housing Material	316L	Corrosion-resistant stainless steelASTM A240
Cable Length	2–10 m	Custom lengths available
Weight	0.5–1.2 kg	Depending on cable length
Output Signal	4–20 mA	Analog current loopIEC 60381-1
Electrical Connection	M12	4-pin connectorIEC 61076-2-101

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Resistance Measurement Circuit
Measures electrical resistance between equipment and ground

Material: Printed Circuit Board with precision resistors
Signal Conditioning Module
Processes raw measurements and compares to thresholds

Material: Integrated Circuit with analog/digital converters
Output Relay
Provides contact closure signal to interlock system

Material: Electromechanical relay with silver contacts
Test Button Part
Allows manual verification of sensor functionality

Material: Polycarbonate button with stainless steel spring
Measurement Contacts
The probes that actually touch the chassis and earth; the resistance is measured across them.

Material: Copper alloy
Stainless Steel Housing
Encloses and encapsulates the electronics against the plant environment.

Material: Stainless steel

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Safety Interlock System

View system integration details

Manufacturers of Grounding Verification Sensor

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Frequently Asked Questions

What is the detection resistance threshold of the Grounding Verification Sensor?

The detection resistance threshold is ≤10 Ω, as per IEC 60364-6. If the measured ground resistance exceeds this value, the sensor triggers an alarm to indicate poor grounding.

What is the response time of the sensor after a ground fault?

The response time is ≤0.1 seconds. This ensures rapid detection and alarm to allow the interlock system to act quickly in preventing equipment operation.

What are the environmental ratings for this sensor?

The sensor has an operating temperature range of -40 to 85 °C and a storage range of -40 to 105 °C, per IEC 60068-2-1/2. It also has an IP67 ingress protection rating (IEC 60529), making it dust-tight and protected against immersion.

What output signal does the sensor provide?

The sensor provides a 4–20 mA analog current loop output, conforming to IEC 60381-1. This signal can be used for monitoring or integration with control systems.

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pressure:	0 to 10 bar
other spec:	IP67 rating, 24V DC power supply, 4-20mA output signal
temperature:	-40°C to +85°C

Product Specifications

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