XNX-UTAI-MHNNN Universal Transmitter

Brand: Honeywell Analytics | Type: XNX Series

Overview: The Honeywell XNX Universal Transmitter is a versatile, high-performance gas detection platform. It supports Searchline Excel, Searchpoint Optima, and generic 4-20 mA sensors. Built for harsh environments, it offers reliable operation from -40°C to +65°C. This model (XNX-UTAI-MHNNN) includes Modbus, Local HART, and an aluminium housing with a ¾” NPT entry.

Key Features & Benefits

• Multi-sensor support: Works with infrared, catalytic, and electrochemical sensors.
• Flexible communication: Integrated Modbus RTU and Local HART for easy system integration.
• Rugged construction: Aluminium housing, rated for -40°C to +65°C, 0-99% RH.
• Simple installation: Surface mount with integral lugs; optional pipe or ceiling brackets.
• Global approvals: Certified for hazardous areas (UL, ATEX, IECEx).

Technical Specifications

• Model Number: XNX-UTAI-MHNNN
• Manufacturer: Honeywell Analytics
• Approval: B (ATEX / IECEx / UL)
• Entry Type: ¾” NPT
• Material: Aluminium (lightweight, corrosion-resistant)
• Personality: Interface for infrared (Searchline Excel, Searchpoint Optima) and 4-20mA inputs
• Options: Modbus RTU (M) and Local HART (H)
• Sensor & Range: None (NNN) – sensor ordered separately
• Mounting: Surface mount via integral lugs; optional pipe kit (Ø100-150mm) or ceiling bracket
• Operating Temperature: -40°C to +65°C (-40°F to +149°F)
• Humidity: 0-99% RH (non-condensing)
• Pressure: 90-110 kPa
• Storage: -40°C to +75°C, 0-99% RH
• Dimensions: 16 x 19.7 x 11.4 cm (6.1″ x 7.8″ x 4.5″)
• Weight: 5 kg

Performance & Accuracy

• Measurement Range: Depends on connected sensor (0-100% LEL, 0-100% Vol, or ppm ranges).
• Frequency Response: Typically T90 < 30 seconds (sensor dependent).
• Sensitivity: High sensitivity for low-level gas detection.
• Linearity: ±2% of full scale (typical).
• Resolution: 0.1% LEL or 1 ppm (sensor specific).
• Temperature Range: -40°C to +65°C (ambient).
• Environmental Tolerance: Withstands dust, moisture, and vibration.
• Interference Immunity: EMI/RFI protected for industrial environments.

Installation & Mounting

• Surface mount: Use integral mounting lugs (4 points).
• Pipe mount (optional): Kit supports Ø100-150mm (4″-6″) pipes.
• Ceiling mount (optional): Bracket available for overhead installation.
• Cable entry: One ¾” NPT conduit hub.
• Orientation: Any angle; avoid direct sunlight or extreme heat sources.

Commissioning & Maintenance

• Easy setup: Intuitive menu via Local HART or Modbus.
• Auto-detection: Recognises connected sensor type automatically.
• Calibration: Single-person, non-intrusive calibration with magnetic wand.
• Diagnostics: Continuous self-test with fault indication.
• Maintenance: Minimal; sensor replacement only (plug-in design).

Compatibility

• Supported Sensors: Searchline Excel, Searchpoint Optima, and generic 4-20 mA transmitters.
• Protocols: Modbus RTU, HART 7, and 4-20 mA analog output.
• Control Systems: PLC, DCS, and SCADA via Modbus or HART.
• Accessories: Pipe mounting kit, ceiling bracket, weather protection cover.

Certifications & Approvals

• ATEX: Ex db IIC T6 Gb (gas) / Ex tb IIIC T85°C Db (dust).
• IECEx: Ex db IIC T6 Gb / Ex tb IIIC T85°C Db.
• UL / cUL: Class I, Div 1, Groups B, C, D; Class II, Div 1, Groups E, F, G.
• CE Mark: Compliant with EMC and Low Voltage Directives.
• IP66/67: Weatherproof and dust-tight.

Package Contents

• 1 x XNX Universal Transmitter (XNX-UTAI-MHNNN)
• 1 x Mounting hardware kit (lugs, screws)
• 1 x Quick Start Guide (digital download)
• 1 x Certificate of Calibration
• Sensor and mounting accessories sold separately.

Warranty & Shipping

• Warranty: 12 months against manufacturing defects.
• Dispatch: 12-24 hours from order confirmation.
• Carriers: FedEx, UPS, DHL (express worldwide).

Expert Review – Manager’s Insight

“The XNX is our top recommendation for critical infrastructure. Its modular design and dual communication (Modbus+HART) simplify upgrades. The aluminium housing withstands extreme conditions. For safety managers, this means fewer callouts and lower total cost of ownership.”

Ideal Applications

• Oil & gas refineries and offshore platforms
• Chemical and petrochemical plants
• Water and wastewater treatment facilities
• Mining and metal processing
• Pharmaceutical and food processing
• Hazardous area storage and loading bays

Frequently Asked Questions (FAQ)

• Q: Is the sensor included with the transmitter?
  A: No. The sensor (Searchline Excel, Searchpoint Optima, or 4-20mA) must be ordered separately to match your gas type.
• Q: Can I use this transmitter with a 4-20 mA sensor from another brand?
  A: Yes. The personality supports generic 4-20 mA inputs, but verify loop compatibility.
• Q: What is the difference between Modbus and HART options?
  A: Modbus enables digital communication with PLC/DCS; HART allows handheld configuration and analog signal overlay.
• Q: How do I mount the unit on a 4-inch pipe?
  A: Use the optional pipe mounting kit (sold separately, part no. XNX-MNT-PIPE).
• Q: What is the maximum cable length for the 4-20 mA output?
  A: Up to 1,000 metres (shielded cable recommended).
• Experience-based: Many users prefer the magnetic wand for calibration – it avoids opening the enclosure in hazardous areas.
• Selection guide: For toxic gases, choose an electrochemical sensor. For combustible gases, opt for infrared or catalytic. Verify temperature range if ambient exceeds 50°C.

Selection Guidance

• Step 1: Identify the target gas (e.g., CH₄, H₂S, CO, O₂).
• Step 2: Select sensor type (IR, catalytic, electrochemical, or 4-20mA).
• Step 3: Confirm environmental conditions (temp, humidity, pressure).
• Step 4: Choose mounting style – surface, pipe, or ceiling.
• Step 5: Order transmitter and sensor separately.

Contact & Support

For technical or sales enquiries, please contact us:

• Email: sales@powergearx.com
• WhatsApp: +86 18030005825

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