Nernst N-802 Zirconia Oxygen Analyzer

Short Description:

Overview

The Nernst N-802 zirconia trace oxygen analyzer is a new analytical instrument developed using the latest zirconia detection technology and microcomputer technology. It can be used for continuous automatic analysis of oxygen content in air separation nitrogen production, chemical processes, glass, and building materials. It can also be used for measuring oxygen content in protective atmospheres of high-temperature sintering furnaces such as protective gases and magnetic materials in the electronics industry.

Features

✓ High quality zirconia detection components are selected, which have the characteristics of long lifespan and fast response.

✓ Unique air path design, with good air tightness, impermeability, and water absorption resistance.

✓ The instrument adopts a large screen full-color touch screen and human-computer interaction menu.

✓ Real time clock display.

✓ Can connect to a printer to achieve timed automatic printing.

✓ It has a timed automatic storage function and can view stored data at any time.

✓ Equipped with a paperless recorder function, it automatically records the curve of oxygen concentration changes over time.

✓ Equipped with RS232 and RS485 communication ports, it can be connected to a computer to achieve real-time data transmission, data storage, curve trend charts, printing reports, and other functions.

✓ Can set upper and lower limit alarm points, with alarm contact output.

✓ Can be calibrated online with standard gas.

✓ The output current can be selected as 0-10mA, 0-20mA, 4-20mA.

Technical Specifications

Measuring Principle	Zirconia Oxide
Measuring Range	0~10 ppm, 0~100 ppm, 0~1000 ppm, 0~1%, 0~5%, 0~10%, 0~25%, 0~100% Auto-ranging supported, with freely configurable custom ranges
Power Consumption	Approx. 400 W
Warm-up Time	Approx. 10 minutes
Ambient Operating Temperature	0 ℃ ~ 45 ℃ (32 ℉ ~ 113 ℉)
Ambient Humidity	≤ 90% RH (Non-condensing)
Storage Temperature & Humidity	-5 ℃ ~ +60 ℃, ≤ 95% RH
Mounting Style	Panel Mount (Flush-mount)
Alarm Relay Output	30 V DC / 1 A, 250 V AC / 1 A
Gas Inlet / Outlet Connections	Default: 2 × φ6 ferrule fittings Optional: φ3, 1/8″ ferrule, 1/4″ ferrule, or φ6 hose connector Base thread: G1/8(F)
Overall Dimensions (W × H × D)	240 × 150 × 250 mm
Panel Cutout Dimensions	228⁺¹ × 138⁺¹ mm
Weight	Approx. 2.5 kg (5.51 lbs)
Enclosure	Steel housing, indoor use only
Gas Wetted Materials	Stainless steel (gas path)

Performance Metrics

Basic Error	±2% FS (>100 ppm); ±5% FS (≤100 ppm)
Zero Drift	±2% FS/7d (>100 ppm); ±5% FS/7d (≤100 ppm)
Span Drift	±2% FS/7d (>100 ppm); ±5% FS/7d (≤100 ppm)
Repeatability	±1%
Response Time	3 seconds
Output Signals	4~20 mA, 0~10 mA, 0~20 mA, RS485, RS232
Power Supply	220 VAC ±10%, 50 Hz ±1 Hz

Sample Gas Conditions

Sample Gas Temperature	0~50 ℃
Sample Gas Flow Rate	500~700 mL/min (Note: Instantaneous flow rate must not exceed 1.5 L/min, otherwise excessive flow may damage the zirconia element)
Sample Gas Pressure	Atmospheric pressure or slight positive pressure
Dust Content	≤100 µg/Nm³, particle size < 0.5 µm
Mist Impurities	None
Humidity	No condensed water
Corrosive Gases	Not allowed
Calibration Gas	Standard gas for instrument calibration
Zero Gas	Oxygen in nitrogen, approx. 1 ppm
Span Gas	Oxygen in nitrogen, 80% of common measuring range concentration
Flammable & Explosive Gases	Not allowed