All Categories > By Primary Gas to be Measured > Sulfur Hexafluoride Analyzers (SF6) > Portable Process Sulfur Hexaflouride Gas Analyzer - 337 Series > Item # Model 337K  
Download PDF Download PDF     Printable Page     Email Email This Page     Save To Favorites Save To Favorites

Item # Model 337K, Portable Process Analyzer for Sulfur Hexaflouride, Suitcase (K) Enclosure

The Nova 337 Portable Process Analyzer has been designed for the detection of sulfur hexaflouride (SF6) primarily in air or nitrogen (N2). However it can be used in some other applications with several background gases present. Consult Nova on these applications.

The thermal conductivity (T/C) cell provides a fast and accurate measurement of SF6. It has an expected life of over 10 years unless contaminated.

In operation, the sample gas will flow through a built-in regulator or be drawn in by a sample pump draws through the sample tube, filter, flow meter and then on to the T/C cell. The detected SF6 is displayed on an LCD digital meter which has a switchable back light for use in dark areas.

A rechargeable 'gel cell' battery provides enough power for approximately 8 hours of continuous operation and the analyzer can be used while it is being recharged. A red LED tells when to recharge and a green LED verifies that it is receiving recharging power. The recharger is included.

Specifications  · Applications  · Features  · Options  · Calibration  · Unique Applications


Method of Detection

Temperature compensated thermal conductivity (T/C) cell

Ranges Available

0-100% SF6 in air or in N2


0.1% of He

Accuracy & Repeatability

±2% of full scale


±1% of full scale per day (after calibration)

Response Time (T-90)

10-15 seconds to 90% step change - not including sample transport time

Ambient Temperature Range

12 to 50 ºC
55 to 120


±2% of F.S. on SF6 in Air

Size & Weight

9 1/2" L x 6 1/2" H x 7" D @ 8 lbs (24 x 16.5 x 18 cm @ 3.6 kg)


AC/DC Operation. 115 VAC, 60 Hz for recharging (220 VAC, 50 Hz available)

Output Options

4-20 mA or 0-1 VDC


High or low SF6 alarms (optional)

Hazardous Area Rating Options

General Purpose, Non-Hazardous

    For checking sulfur hexafluoride (SF6) in blanketing applications for power cable, switch gear and magnesium production.

  • Rugged design that is easy to operate
  • Fast warm up and response
  • Long life thermal conductivity cell that provides accurate and stable readings
  • Digital meter readout with backlight
  • Modular layout that is easy to maintain
  • Sample can be returned to process (at atmospheric pressure)
  • Rechargeable 'gel cell' battery operated
  • Built in sample pump or regulator
  • Weatherproof (WP) cabinet with clear lexan cover

  • Recorder outputs of 0-1 V or 4-20 mA
  • Sample Condensate removal for wet applications
  • Suitcase (K) style cabinet available
  • AC power only operation
  • SF6 alarms with LED
  • Detachable/portable data logger

  • Ambient air for zero
  • Source of 100% SF6 calibration gas for span.

Unique Applications
    All Nova analyzers are built using proven technologies and techniques. If this product does not suit your application, please contact Nova. In many cases, we are able to build an analyzer specific to your needs.


·  337WP Enclosure


337 Portable SF6 Analyzer
(PDF, 642KB)