HK-SG-200 Audible and Visual Alarm

1. Overview

The HK-SG-200 Audible and Visual Alarm is designed to alert on-site personnel in the event of a fire or other emergency. It can be installed directly on combustible gas detectors as a local alarm unit or mounted on explosion-proof instruments in hazardous industrial areas. When the connected device enters an alarm state, the HK-SG-200 emits strong sound and light signals to warn personnel.

This alarm complies with the explosion-proof standards GB 3836.1-2010 “Explosive Atmospheres – Part 1: Equipment – General Requirements” and GB 3836.2-2010 “Explosive Atmospheres – Part 2: Equipment Protection by Flameproof Enclosure ‘d’.”

2. Technical Specifications

• Operating Voltage: 24VDC

• Flashing Frequency: 1 flash/second

• Sound Pressure Level: 85 dB

• Alarm Output: Audible + Visual

• Electrical Interface: M20 × 1.5

• Ingress Protection: IP66

• Explosion-Proof Grade: Ex d IIC T6 Gb / Ex tD A21 IP66 T80°C

• Operating Temperature: -40℃ to +60℃

• Operating Humidity: ≤93% RH

• Power Consumption: <2W

• Dimensions: Φ36 × 98mm × 67mm

• Weight: 340g

3. Basic Function

When the alarm receives a triggering signal from a connected detector, it outputs a strong audible and visual alert to notify personnel.

4. Structural Features

The HK-SG-200 features a compact and simple structure for convenient installation. Key components include:

• Alarm light

• Casing

• Buzzer

• 24V power wires (Red = Positive, Black = Negative)

(Refer to included diagram for dimensions and layout.)

5. Installation Notes & Explosion-Proof Requirements

1. Wiring
   The alarm must be connected with correct polarity: red wire to positive (+) and black wire to negative (–). Incorrect wiring may damage internal electronic components.

2. Precautions

   • Periodically inspect and maintain the high-temperature sealing material at cable entry points. Replace if aged or damaged.

   • Do not arbitrarily replace or alter components or parts that affect the explosion-proof integrity.

   • Always disconnect power before performing any maintenance; live operation is strictly prohibited.

   • Avoid impacts or strong shocks during use.

   • Alarms in explosive environments must be calibrated once per year.

   • Alarms operating under high temperature, corrosive, or vibratory conditions should be calibrated every six months.

   • Any product that has passed explosion-proof testing must not be modified or tampered with.

6. Warranty Policy

This product has undergone aging, calibration, and full inspection per national standards.

Warranty Term: 1 year from purchase date, covering free repairs or replacement.
Exclusions:

• Damage from force majeure, misuse, improper installation, or human error

• Unauthorized disassembly or modification

• Damage during shipping

• Damage due to dropping or impact

7. Contact Information

Sales Hotline: +86 21-68901087
Technical Support: +86 21-68910600
Fax: +86 21-33275717
Address: Floor 2, Building 27, No. 58, Lane 7224, Hunan Highway, Pudong, Shanghai
Email: pudongleyun888@126.com