Product details
Product Description
The Honeywell Analytics 780248 is a single-pass NDIR gas sensor. It detects ammonia (NH3) from 9 to 100 ppm. This unit offers three alarm relays and a 4-20 mA output. It includes a 10-foot sampling tube. The sensor suits HVAC, refrigeration, and safety systems. It provides reliable performance in industrial environments.
Key Features at a Glance
- Detection: Ammonia (NH3) with NDIR technology
- Outputs: 3 alarm relays (1A @ 30VDC / 0.5A @ 125VAC) + 4-20 mA
- Display: 4-digit local readout of current and peak gas levels
- Alarm: Visual indication with N.O./N.C. contacts
- Coverage: 10 ft sample tube included, max 100 ft
- Protocol: Modbus/TCP for easy integration
Technical Data
- Brand: Honeywell Analytics
- Model: 780248
- Series: Gas & Specialty Sensors
- Supply Voltage: 24 VDC (-15% to +10%) @ 208 mA
- Measurement Range: 9 – 100 ppm (NH3)
- Repeatability: ±5% of measured value
- Linearity: ±2% of measured value
- Response Time: 2 to 30 sec (depends on tube length)
- Warm-Up Time: <10 minutes
- Operating Temperature: 32° to 104°F (0° to 40°C)
- Humidity: 15% to 90% RH (non-condensing)
- Enclosure: NEMA 1 (indoor use)
- Dimensions: 5.9 x 12.6 x 6 in (15 x 6.5 x 15.3 cm)
- Weight: 1.8 lb (0.8 Kg)
Installation & Setup
- Mounting: Wall or panel mount (NEMA 1 enclosure)
- Sampling Tube: Use the supplied 10 ft tube; max length 100 ft
- Wiring: Connect 24 VDC power, alarm relays, and 4-20 mA loop
- Modbus: TCP/IP connection for remote monitoring
- Startup: Allow <10 min warm-up before calibration
Maintenance & Service
- Calibration: Simple zero/span adjustment via display
- Self-Test: On-board diagnostics with visual alarm check
- Cleaning: Wipe the enclosure with a dry cloth; do not use solvents
- Tube Check: Inspect sample tubing for kinks or blockages monthly
- Firmware: Field-upgradable via Modbus (contact support)
Compatibility & Approvals
- Certifications: ETL and CE marked
- Communication: Modbus/TCP standard
- Outputs: 4-20 mA into 250 Ω load, relay contacts rated 1A/30VDC or 0.5A/125VAC
- Interference: Immune to common gases; NDIR single-pass design
Package Contents
- Honeywell 780248 gas sensor
- 10 ft (3 m) sampling tube and exhaust
- Mounting hardware
- Quick start guide
- Certificate of calibration
Warranty & Shipping
- Warranty: 12 months against defects
- Dispatch: Ships within 12–24 hours of order
- Carriers: FedEx, UPS, or DHL (tracked)
Expert Review
“The 780248 provides stable ammonia detection with a fast 2-second response. Its NDIR sensor avoids cross-interference. The NEMA 1 housing suits indoor machine rooms. The 4-20 mA output and Modbus/TCP make it a flexible choice for building automation.”
Manager’s Insight
“For facility managers, this sensor reduces false alarms. The local peak reading helps trend analysis. The 12-month warranty and 24-hour shipping minimize downtime. We recommend annual calibration for best accuracy.”
Typical Applications
- Refrigeration plant ammonia monitoring
- HVAC air quality control
- Industrial safety systems
- Cold storage and food processing
- Chemical storage areas
FAQ – Frequently Asked Questions
- Q: What is the maximum sampling distance?
A: 100 feet (30 m) with the included 10-ft tube. - Q: Can I connect this to a PLC?
A: Yes, via 4-20 mA or Modbus/TCP. - Q: Does it work in high humidity?
A: Yes, up to 90% RH non-condensing. - Q: How often should I calibrate?
A: Every 6–12 months, depending on use. - Q: Is the relay output N.O. or N.C.?
A: User-selectable for each alarm level.
Selection Guide – Which Sensor Do I Need?
- For ammonia (NH3) from 9–100 ppm, choose 780248.
- If you need a wider range, consider other Honeywell models.
- For outdoor use, check NEMA 4X enclosures.
- Modbus/TCP is ideal for networked systems.
- For standalone operation, use the 4-20 mA output.
Inquiries:
sales@powergearx.com |
+86 18030005825
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