SulfiLogger™ X1-1220 sensor

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The SulfiLoggerTM X1-1220 sensor continuously measures hydrogen sulfide (H2S) directly in pressurized process water or raw natural gas.

  • Designed and tested specifically for process water and natural gas processing environments (both offshore and onshore)
  • ATEX certified for use even in Zone 0
  • Features superior corrosion resistant materials (surface treated stainless steel) and Viton® fluorocarbon seals
  • Compatible with the SulfiLoggerTM natural gas sensor system (up to 300 barg pressure)
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Reliable H2S insights
The SulfiLoggerTM H2S sensor provides reliable insights into your H2S challenge by continuously measuring H2S directly in pressurized process water or untreated natural gas. These unique insights – among other applications – enable you to cost-optimize desulphurization processes, protect assets from H2S induced corrosion, and keep H2S levels under constant surveillance.


Measure H2S anywhere
Built to withstand the harsh conditions found in gas producing facilities, the SulfiLoggerTM sensor is designed to operate under anaerobic conditions and in wet gas with up to 100% humidity. It is suitable for installation virtually anywhere, including right after first-stage separators in oil & gas processing.


Designed for offshore and onshore natural gas applications
The SulfiLoggerTM X1-1220 sensor is designed specifically for use in demanding offshore and onshore natural gas applications. The sensor is ATEX certified for use even in zone 0 and it features surface treated stainless steel for improved corrosion resistance. For use in high pressure environments, the sensor can be installed in the SulfiLoggerTM natural gas sensor system.

Technical specifications

Measurement media* Pressurized process water
Natural gas
Measurement range* Specified in the selection above
Max pressure 3 barg (44 psig)
Up to 300 barg (4350 psig) with the SulfiLoggerTM natural gas sensor system
Accuracy +/- 5%
Detection limit 1% of full range
Response time <25 seconds
Operating humidity range 0-100%
Operating temperature range 0 °C to +60 °C
(32 °F to +140 °F)
Storage temperature range 0 °C to +40 °C
(32 °F to +104 °F)
Design temperature range -20 °C to +60 °C
(-4 °F to +140 °F)
Power input options 4-20 mA loop power
DC power (12-28 VDC)
Data output options 4-20 mA analogue signal
RS-232 digital signal
Cloud data*

* The sensor’s analogue 4-20 mA signal is configured to one measurement media and range. Data can be read out in both mg/L and ppm in SulfiLoggerTM WebData (requires the PowerCom Box).
* With the PowerCom Box accessory.

Mechanical specifications

Length 240 mm (9.4 in)
Diameter Ø48.3 mm / 1 ½” pipe
Weight 0.85 kg (1.9 lb)
Front design Threaded G 1″
(ISO 228-1, BSPP)
Material Surface treated stainless steel for improved corrosion resistance
EN 1.4404 (316L)

Other specifications

Warranty 12 months***
ATEX marking**** II 1G    Ex ia IIC T4 Ga

*** When used in accordance with the Installation Manual.
**** Additional Ex specifications are listed in the Installation Manual.

Mounting options

SulfiLogger natural gas sensor system
This sensor is compatible with the SulfiLogger natural gas sensor system.

Additional resources

ATEX certificate & DoC

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Products are available for sale and delivery to registered companies in the European Economic Area EEA (all EU and EFTA member states), and to Switzerland, the United Kingdom, the United States, and Canada.

For inquiries outside of these geographic regions, please contact us.

Products are shipped via UPS.

Delivery charges are calculated at checkout.

Prepayment by bank transfer.

All prices are excluding VAT, import duties and sales taxes.

We only sell to registered companies (not to individuals)