Dräger PointGard 3720
- complete 1-channel gas detection system
- Monitors carbon dioxide in ambient air
- Uses high-performance plug-and-play electrochemical DrägerSensor
- Robust, compact housing with IP66 protection
Discover PointGard: Your all-in-one solution for gas detection
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Highlights
The Dräger PointGard 3720 is a complete 1-channel gas detection system for detecting carbon dioxide in ambient air. The robust yet compact IP66 housing already contains all the necessary alarm equipment.
All-in-One Solution
The Dräger PointGard 3720 is the ideal choice for anyone who needs a reliable gas detection system without the complexity of assembling multiple components. It combines the functionality of a transmitter, controller, and integrated alarm devices—comp … More Information
lete with flashing lights and an audible horn—in one compact unit. The AC version can be powered easily via an optional AC power cord at any standard outlet. For optimal placement, the display and alarm unit are separate from the sensor: mount the PointGard 3720 at eye level for clear visibility, while positioning the sensor close to the measurement point. A cable length of up to 30 m provides flexibility. The sensor, the Dräger PIR 7200, is approved for hazardous areas and can be equipped with accessories for installation in ducts or ventilation shafts.Versatile Applications
PointGard 3720 is designed for local gas concentration monitoring. A typical use case is CO₂ measurement in enclosed or poorly ventilated spaces. Install the PointGard outside the room and the sensor inside—so you know the gas level before entering. … More Information
If alarm thresholds are exceeded, the integrated alarms alert you immediately and can even trigger automatic ventilation to restore safe conditions.Advanced Sensor Technology
Inside the PointGard 3720 are the proven electronics of the Dräger Polytron 8720, TÜV-certified for SIL2 capability. The SIL2-rated Dräger PIR 7200 infrared sensor features double-compensated 4-beam optics for exceptional accuracy and long-term stabi … More Information
lity. It detects optical contamination early, ensuring timely maintenance and uninterrupted operation.Calibration intervals can extend up to one year, depending on conditions. Measurement ranges span from 0–2,000 ppm to 0–30 Vol% CO₂, with continuous operation in temperatures from –40 °C to +77 °C.Integrated Alarms
The PointGard 3720 includes bright, durable flashing lights and an adjustable horn (85–100 dB). Alarm colors clearly indicate status:
• Orange/Red for pre-alarm and main alarm
• Green/Red or Green/Blue for safe/unsafe conditions and main alarm
The horn … More Information
silence button offers flexible reactivation options (3 min, 6 min, or until the next alarm).Flexible Power Options
The unit features a 120–230 VAC / 24 VDC power supply and can be ordered with a country-specific power cord. For installations with an existing 24 VDC supply, a variant with a 24 VDC power supply is available.
User Interface
The measured value, gas name and measuring unit are permanently shown on the display. If required, the concentration history of the last 15 minutes can also be shown. The display has a backlight in red or green to ensure readability even in poor ligh … More Information
ting conditions. The colors can be set via a slide switch inside the device. Below the display are three status LEDs in green (operational), yellow (error) and red (alarm). All settings on the PointGard 3720 are made via a password-protected menu. The three-button control allows quick navigation through the menu items. Measuring range and alarm thresholds are already set to the usual values after plugging the sensor. They can be adjusted at any time.Interfaces
In addition to the integrated alarm means, the PointGard 3720 also has dry contact switching relays. This enables additional automated switching measures. Relays are available for A1, A2 and faults. In addition, an external digital input, such as a … More Information
fault contact of neighboring machines, can be read in and switch off the green light (safe status) on the PointGard 3720. For integration into higher-level systems (visualization systems, data acquisition systems, PLCs, central gas warning systems), the analog 4-20 mA current interface according to NE 43 can be used. HART® communication allows you to synchronize settings with a connected Dräger REGARD 3000 or Dräger REGARD 7000. In addition, remote access is possible via HART® using Dräger PolySoft software or other HART® communication devices.
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