Grade Sensor

Product Specifications

Technical details and manufacturing context for Grade Sensor

Definition

A Grade Sensor is a component used in grade control systems to measure the inclination, slope, or grade of a surface. It is commonly applied on construction machinery, agricultural equipment, and industrial platforms. The sensor provides real-time angular data to a control system, enabling automated adjustments to maintain a desired grade or level during operations such as excavation, grading, paving, or material handling. The sensor typically uses inertial measurement principles, such as MEMS accelerometers or gyroscopes, to detect orientation relative to gravity. It measures tilt angle by sensing gravitational force components along its axes. Output is often an analog voltage or digital signal proportional to the angle, transmitted to a controller for processing and corrective action. Key parameters include a measurement range of -45 to 45 degrees, accuracy of ±0.1 degrees at 25 °C, resolution of 0.01 degrees, and a 4-20 mA analog current loop output. Supply voltage is 9-36 V DC with reverse polarity protection. Operating temperature range is -40 to 85 °C. The housing is anodized aluminum, with an ingress protection rating of IP67 (dust-tight and immersion up to 1 m) per IEC 60529. Vibration resistance is 20 g (10-2000 Hz) per IEC 60068-2-6, and shock resistance is 100 g (11 ms half-sine) per IEC 60068-2-27. Approximate weight is 200 g. Materials include silicon (MEMS wafer), epoxy resin (encapsulation), and copper alloy (leads/contacts). These specifications are typical reference values; verify model-specific data with the manufacturer or supplier before procurement.

Working Principle

The sensor operates on inertial measurement principles, using MEMS accelerometers or gyroscopes to detect changes in orientation relative to gravity. It measures the tilt angle by sensing the gravitational force component along its axes. The output, often an analog voltage or digital signal proportional to the angle, is transmitted to the system's controller for processing and corrective action.

Common Materials

Silicon (MEMS wafer), Epoxy resin (encapsulation), Copper alloy (leads/contacts)

Technical Parameters

Parameter	Typical range	Notes & selection driver
Measurement Range	-45–45 °	Typical range for slope sensors
Accuracy	±0.1 °	At 25 °C
Resolution	0.01 °	Digital output
Output Signal	4–20 mA	Analog current loop
Supply Voltage	9–36 V DC	Reverse polarity protected
Operating Temperature	-40–85 °C	Extended range available
Ingress Protection	IP67	Dust-tight and immersion up to 1 mIEC 60529
Vibration Resistance	20 g	10–2000 HzIEC 60068-2-6
Shock Resistance	100 g	11 ms half-sineIEC 60068-2-27
Housing Material	Aluminum	Anodized
Weight	200 g	Approximate

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

MEMS Sensing Element Part
The core micro-machined structure that physically moves or changes electrical properties in response to tilt, converting mechanical inclination into an electrical signal.

Material: Silicon
Signal Conditioning Circuit
Amplifies, filters, and linearizes the raw signal from the sensing element for accurate and stable output.

Material: Semiconductor (IC), Copper, FR-4 (PCB substrate)
Protective Housing
Encapsulates and protects the internal electronics from environmental factors like moisture, dust, and vibration.

Material: Aluminum alloy or engineering plastic (e.g., PBT)
Electrical Connector Part
Provides the interface for power supply and output signal transmission to the external control system.

Material: Thermoplastic, brass contacts

Application & selection

Application Fit & Sizing Matrix

Operational Limits

pressure:	0 to 100 psi
other spec:	±0.1° accuracy, IP67 rating, 10-30 VDC power
temperature:	-40°C to +85°C

Media Compatibility

✓ Construction equipment (excavators, graders) ✓ Agricultural machinery (tractors, combines) ✓ Industrial automation (conveyor systems, robotic arms)

Unsuitable: High-vibration environments (e.g., near heavy machinery impacts or explosions)

Sizing Data Required

Required measurement range (degrees or percentage slope)
Mounting orientation and surface type
Output signal type (analog 4-20mA, digital CAN, etc.)

Risk, maintenance & compliance

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause

Signal drift/calibration loss

Cause: Environmental contamination (dust, moisture, chemicals) affecting sensing elements, or thermal cycling causing component degradation

Mechanical mounting failure

Cause: Vibration-induced loosening of mounting hardware or improper installation causing misalignment and excessive stress

Maintenance Indicators

Inconsistent or erratic readings compared to reference measurements
Physical damage to sensor housing or visible corrosion/contamination at sensing interface

Engineering Tips

Implement regular calibration schedule with documented drift analysis to detect degradation before failure
Use proper mounting hardware with vibration-resistant features (e.g., lock washers, thread-locking compounds) and ensure correct alignment during installation

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards

IEC 60529 Degrees of Protection by Enclosures (IP Code)

Quoted from the published standard.

Manufacturing Precision

Measurement Accuracy: +/-0.5% of full scale
Repeatability: +/-0.1% of reading

Quality Inspection

Calibration Verification against NIST-traceable standards
Environmental Testing (Temperature, Humidity, Vibration)

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

Compare the published product scope and source details, then include your specifications and quantity in an enquiry.

Manufacturers of Grade Sensor

5 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Nanjing Sky Mems Technology Co., Ltd

Nanjing, Jiangsu, CN

Also makes: Inertial Measurement Unit (IMU), Inertial Measurement Unit, Measurement Unit and 2 more