Determine Total Sulfur and Total Nitrogen in a Single Analyzer
Product Overview
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.
PAC Powered by Antek’s NSure is built on over 40 years of expertise in elemental analysis.
Key Features
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
Specs
Detection Method
NSure Sulfur: UV- Fluorescence (UVF) Spectrometry
NSure Nitrogen: Chemiluminescence detection (CLD)
Method Correlation
NSure Sulfur: ASTM D5453, ASTM D6667, ASTM D7183, ISO 20846(SH/T0689,GB/T 11060.8 in China)
NSure Nitrogen: ASTM D4629, ASTM D5176, ASTM D5762, ASTM D7184, DIN 38409
Certifications / Area Classifications
CSA/UL, NEC Class 1 Division 2 Groups A, B, C and D
ATEX:
- 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)
Nitrogen:
- 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)
100 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 and 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 and 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)
Configuration
NSure Sulfur: UV- Fluorescence (UVF) Spectrometry
NSure Nitrogen: Chemiluminescence Detection (CLND)
Documentation
| Title | Description | |
| Brochure | NSure Brochure (US) | Download |
| Brochure | Maintenance Kit | Download |
| Poster | Optimization to Meet Sulfur and Nitrogen Regulations | Download |
| Application Notes | Monitoring S and N in High Viscosity Products | Download |
| Application Notes | Continuous Monitoring of Total Sulfur in Diesel | Download |
| Application Notes | Distillation and Sulfur Analysis in Gasoline Blender | Download |
| Application Notes | Diesel Naphtha Under 1ppm | Download |



