Editorial Technical Reference

Alarm System

This page explains how Alarm System is classified within Machinery and Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

An alarm system integrated into Load Moment Indicator (LMI) equipment that monitors operational parameters and triggers audible/visual alerts when critical thresholds are exceeded, preventing equipment overload and ensuring safe crane operation.

Product Specifications

Technical details and manufacturing context for Alarm System

Definition
An alarm system integrated into Load Moment Indicator (LMI) equipment that monitors operational parameters and triggers audible/visual alerts when critical thresholds are exceeded, preventing equipment overload and ensuring safe crane operation. This component is part of the machinery and equipment manufacturing industry, specifically designed for use in LMI systems on cranes and similar lifting equipment. It continuously receives load moment data from LMI sensors, compares these values against pre-set safety thresholds, and activates alarm signals—such as audible buzzers, flashing lights, and display warnings—when load conditions approach or exceed safe operating limits. The system is housed in a plastic enclosure and comprises electronic components and copper wiring. It operates on a rated voltage of 24 V DC (±10%) with a maximum power consumption of 5 W. The alarm sound level ranges from 85 to 110 dB(A) at 1 meter distance, per IEC 61672-1. It is designed to operate in temperatures from -20°C to 60°C (non-condensing) and can be stored from -40°C to 85°C. The ingress protection rating is IP54 to IP65 per IEC 60529, and it withstands relative humidity up to 95% (non-condensing). The response time from signal to alarm is ≤100 ms. The output relay rating is 2–5 A resistive load at 24 V DC. Typical dimensions are 120×80×40 mm (W×H×D) and weight is ≤0.5 kg. Vibration resistance is tested at 2 g acceleration over 10–500 Hz per IEC 60068-2-6. These specifications are reference ranges; verify model-specific values and standards with the legal manufacturer or supplier before procurement or installation.
Working Principle
The alarm system continuously monitors load moment values from LMI sensors. It compares these readings against pre-set safety thresholds. When load conditions approach or exceed safe operating limits, the system activates alarm signals, including audible buzzers, flashing lights, and display warnings. This ensures operators are alerted to potential overload conditions, allowing timely intervention to prevent equipment damage or accidents.
Common Materials
Electronic components, Plastic housing, Copper wiring
Technical Parameters
ParameterTypical rangeNotes & selection driver
Rated Voltage24 ±10% V DCStandard for industrial control systems
Power Consumption≤5 WMax power for alarm system
Alarm Sound Level85–110 dB(A)At 1 m distanceIEC 61672-1
Operating Temperature-20–60 °CNon-condensing
Storage Temperature-40–85 °CFor long-term storage
Ingress ProtectionIP54–IP65Dust and water resistantIEC 60529
Relative Humidity≤95 %Non-condensing
Response Time≤100 msFrom signal to alarm
Output Relay Rating2–5 AResistive load at 24 V DC
Dimensions (W×H×D)120×80×40 mmTypical enclosure size
Weight≤0.5 kgLightweight for mounting
Vibration Resistance10–500 HzAt 2 g accelerationIEC 60068-2-6

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
  • Microcontroller
    Processes sensor data and controls alarm activation logic
    Material: Silicon semiconductor
  • Audible Buzzer Part
    Produces warning sounds when alarm conditions are met
    Material: Piezoelectric ceramic
  • Visual Indicator Part
    Provides flashing light warnings for alarm conditions
    Material: LED components

Application & selection

Application Fit & Sizing Matrix

Operational Limits
pressure: 0 to 10 bar
temperature: -40°C to +85°C
ingress protection: IP67
vibration resistance: Up to 5g RMS
Media Compatibility
✓ Hydraulic oil systems ✓ Industrial machinery vibration monitoring ✓ Crane load monitoring systems
Unsuitable: High-concentration abrasive slurry environments
Sizing Data Required
  • Maximum load capacity of the monitored system
  • Required response time for alarm activation
  • Power supply voltage and current requirements

Risk, maintenance & compliance

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Sensor Drift/Calibration Loss
Cause: Environmental factors (temperature fluctuations, humidity, dust accumulation) causing sensor components to degrade or lose calibration accuracy over time, leading to false alarms or missed detections.
Power Supply/Electrical Failure
Cause: Voltage spikes, brownouts, or aging components (capacitors, transformers) in power circuits causing intermittent operation, complete shutdown, or damage to control electronics.
Maintenance Indicators
  • Frequent false alarms or inconsistent activation thresholds
  • Unusual audible noises (buzzing, clicking) from control panels or sensors during normal operation
Engineering Tips
  • Implement regular calibration and environmental testing schedules using certified reference standards to maintain sensor accuracy and system reliability.
  • Install surge protection devices and uninterruptible power supplies (UPS) with routine battery testing to ensure stable electrical supply and graceful shutdown during power events.

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
ISO 7240-1:2014 (Fire detection and alarm systems - Part 1: General and definitions) ANSI/UL 864 (Standard for Control Units and Accessories for Fire Alarm Systems) EN 54-1:2011 (Fire detection and fire alarm systems - Part 1: Introduction)

Quoted from the published standard.

Manufacturing Precision
  • Sound pressure level: +/- 3 dB at 1 meter
  • Response time: +/- 0.5 seconds from trigger to activation
Quality Inspection
  • Electrical safety test (insulation resistance, dielectric strength)
  • Environmental durability test (temperature cycling, humidity exposure)
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.

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Manufacturers of Alarm System

11 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.

BluNet
Ningbo, Zhejiang, CN
CE UL
Also makes: Radar Sensor, Motion Sensor, Speaker Driver and 3 more
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “alarm systems to a customer in Peru.”
View source page ↗ blunet.com.cn · recorded 2026-08-22
Beijing JiaAn Electronics Technology Co., Ltd.
Beijing, CN
Also makes: IoT Gateway, Wi-Fi Module, Remote Control and 1 more
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Car Alarm System”
View source page ↗ rf-products.com · recorded 2026-09-12
Blue Jay
Chongqing, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “PRE-FIRE ALARM SYSTEM”
View source page ↗ cqbluejay.com · recorded 2026-08-27
Hanwei Electronics Group Corporation
Beijing, CN
Also makes: Gas Panel, Flame Detector, Gas Detection System and 3 more
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Smart Home Alarm System”
View source page ↗ hwsensor.com · recorded 2026-08-30
Shanghai Vigour Technologies Co., Ltd.
Shanghai, CN
Also makes: Pressure Regulator
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “监控系统 Alarm System 查看更多”
View source page ↗ vigourco.com · recorded 2026-09-08
Shaoxing Leitai Machinery Co., Ltd.
Zhejiang, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “├─ Crane Alarm System”
View source page ↗ sxltcrane.com · recorded 2026-09-10
Shenzhen Asenware Test and Control Technology Co., Ltd.
Zhongshan, Guangdong, CN
Also makes: Input/Output Module
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Fire Alarm System”
View source page ↗ asenware.com · recorded 2026-09-14
Shenzhen Chitongda Electronic Co., Ltd.
Shenzhen, Guangdong, CN
Also makes: Motion Sensor
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Shield Alarm System”
View source page ↗ wolf-guard.com · recorded 2026-09-14
Shenzhen Sanland Technology Co., Ltd.
Guangdong, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Network Security Alarm System”
View source page ↗ sanlandtech.com · recorded 2026-08-27
Yuebiz Technology Co., Ltd.
Guangdong, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “BT car Alarm System”
View source page ↗ yuebiz.com · recorded 2026-08-31
Zhejiang UN Forklift Co., Ltd.
Hangzhou, Zhejiang, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Overload Alarm System”
View source page ↗ unforklift.com · recorded 2026-09-16
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Frequently Asked Questions

What is the purpose of this alarm system?

It monitors load moment values from LMI sensors and alerts operators when thresholds are exceeded, preventing overload and ensuring safe crane operation.

What are the key electrical specifications?

Rated voltage is 24 V DC (±10%), power consumption ≤5 W, output relay rating 2–5 A resistive at 24 V DC, and response time ≤100 ms.

What environmental conditions can it withstand?

Operating temperature -20°C to 60°C, storage -40°C to 85°C, relative humidity ≤95% non-condensing, ingress protection IP54–IP65, and vibration resistance 10–500 Hz at 2 g.

How should I verify the specifications?

The listed values are reference ranges. Always confirm model-specific values and standards with the legal manufacturer or supplier before use.

Related equipment

Applied To / Applications

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

Industrial Ecosystem & Supply Chain Structure

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Alarm System.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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