NSure: Nitrogen & Sulfur

NSure Sulfur: ASTM D5453, D6667, ISO 20846
NSure Nitrogen: ASTM D4629, ASTM D5176, DIN 38409, TEIL 27, EN 12225

NSure is our next-generation total sulfur and total nitrogen analyzer offering reliable and repeatable measurements over a wide range, even during process swings and ensures tight correlation with primary test methods. NSure's updated technology guarantees ease of use and maintenance. This innovative process solutions for gas, LPG and liquid samples is ideal for online monitoring of blending and refinery operations, as well as petrochemical, wastewater and emissions monitoring. NSure, uses the same proven robustness of its previous model —the 6200.

  • Meet sulfur regulations and control your process with continuous measurements
  • Achieve precise measurements with correlation to primary test methods
  • Complete combustion of sample allows for fast response even in process
  • Innovative design can operate over a wide range and withstand process swings
  • User-friendly and easy maintenance
Detection Method NSure Sulfur: UV- Fluorescence (UVF) Spectrometry
NSure Nitrogen: Chemiluminescence detection (CLND)
Method Correlation NSure Sulfur: ASTM D5453, D6667, ISO 20846(SH/T0689,GB/T 11060.8 in China)
NSure Nitrogen: ASTM D4629, DIN 38409, TEIL 27, ASTM D5176, EN 12225
Certifications / Area classifications CSA/UL, NEC Class 1 Division 2 Groups A, B, C & D
Zone 1 Ex db ib pxb IIC T4 Gb (T3 w/heated valve)
Zone 2 Ex db nA pxb IIC T4 Gb (T3 w/heated valve)
Range Sulfur:
• Full-scale ranges from 0-1 ppm/wt to 0–5% level (field adjustable)
• Full-scale ranges from 0-1 ppm/wt to 0–2000 ppm/wt level (field adjustable)
• Note: Higher ranges available, consult factory. Dual ranges with DCS remote selectable
or automatic range switching.
Streams Single or Dual stream options
Ultra-low detection (LLD) 20 ppb
Instrument unit ppm (mg/m3 is optional, users need to provide relevant parameters as required)
Repeatability Within <0.5% of full scale, for most applications
Response Time 1 minute per stream
Analysis Time 1-5 minutes per stream (application dependent)
Noise Less than 1% of full scale
Zero/Span drift 1% of full scale per week
Calibration/Validation Automatic or manual system validation and calibration with user-defined parameters
Calibration/Validation Time 1 minute per stream (application dependent)
Communication Outputs

4-20mA (active) isolated outputs, range selectable
Discrete digital inputs and outputs for remote control and status indicationRS-485 for Modbus RTU (standard)
Modbus TCP/IP and Ethernet (standard)
Remote workstation (optional)

Automatic diagnosis Yes
Supply & Connections • Carrier Gas: Argon, instrument air* or nitrogen (99.975%) regulated to 50 psig (3.4 Bar) at 1-15 cc/min (typical; application dependent)
• Combustion Gas: Instrument air* or oxygen O2 (99.975%) regulated to 50 psig (3.4 Bar) at 350-500 cc/min (typical; application dependent)
• Valve & Pneumatic Air Supply: Clean, dry, particle-free air @ 80-100 psig (5.5 - 6.9 Bar)
• Purge Air Supply: Clean, dry, particle-free air at 80-120 psig (5.5 - 6.9 Bar); 425 LPM (15 SCFM) for startup and then 130 LPM (4.6 SCFM) for normal operation
*Instrument air: Clean, dry, particle-free
Note: NSure Sulfur can be operated on 100% instrument air for most applications
Sample Conditions (without Sample Conditioning System) • Sample Phase: Gas or Liquid
• Sample Inlet Pressure: Up to 400 psig (27.6 Bar) (application dependent)
• Sample Inlet Temperature: Up to 212˚F (100˚C)
• Sample Condition: Sample should be filtered to at least 0.5 microns
• Sample Return Pressure: <10-20 psi input (0.7 – 1.4 Bar); maintain ≥25 psi (1.7 Bar) differential to return to process
Voltage/ Current/ Frequency 115 VAC (13 Amps) or 230 VAC (6.5 Amps); 50-60 Hz
Power 1500 Watts
Display LCD: PLC with 7” (17.8 cm) touchscreen display or 15” (38.1 cm) touchscreen display
The touchscreen is used to program the unit and display current and historical analyser results and alarm status
Operating temperature 32-105˚F (0-40˚C), extreme conditions may require vortec cooler option
Analyzer Dimensions • Enclosures: Width – 26 in (66 cm), Depth – 17 in (43.2 cm), Height – 45 in (114.3 cm)
• Floor to analyzer (minimum) – 18 in (23 cm); Add 5 inches to height for Bebco Vent
• Unobstructed-Mounted Enclosure: Width – 26 in (66.04 cm); Depth – 30 in (76.2 cm), Height – 72 in (182.9 cm)
Analyzer Weight 400 pounds (181.4 Kg)
Crated Dimensions and Weight 86 in (218.4 cm) x 42 in (106.7 cm) x 56 in (142.2 cm); 775 lbs. (351.5 Kg)
  • NSure Sulfur: UV- Fluorescence (UVF) Spectrometry
  • NSure Nitrogen: Chemiluminescence detection (CLND)

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