Gas Sensor Accessories

Sierra Monitor has a variety of accessories that help facilitate in the installation, maintenance, and calibration of hazardous gas detectors. These options aid in providing a system designed to meet the specific needs of the user.

Gas Calibration Systems and Gases are selectable to enable the user to easily and properly calibrate gas sensor modules. Three different calibrators, the Calibrator Kit 1250-XX, the Permeation Type Calibrator 9210-00, and the Calibration Gas Delivery System 1200-26 all provide calibration methods but each are specialized for different gases. The individual calibration Gas Cylinders 1260 Series are sold separately.

Sample draw products are used in applications in which the sensor cannot be installed directly at the gas sensing location, due to poor accessibility or the harshness of the environment. Sample is continuously drawn from the sensing location to the sensor at a more suitable location. Three different products are offered by Sierra Monitor:  Sample Draw Panel 5392-21, Sample Draw Fitting 5399-01, Sample Draw Assembly 5398-01, and Sample Draw/Dilution Assembly 5398-02.

Sensor mounting products connect to gas and fire detectors to provide protection and the ability to mount in difficult areas. The Rainshield 5311-00 is mounted on a sensor head to protect the sensor from direct exposure to rain, hosedown, and other splashing liquids. The Duct Mount 5394-00 fitting facilitates installation of the gas sensor module onto an air duct.

With calibration adapters, a gas sensor can be easily calibrated. The standard calibration adapter screws over the head of a sensor, and then calibration gas is fed through a tube connected to the adapter. Standard Calibration Adapter 5358-01 is available to aid in calibration procedures.

Gas Sensor Accessories

Gas Calibration Systems and Gases

  • Wide Range – Calibrate a wide variety of combustible and toxic gases with different gas cylinders
  • Large Capacity – Perform many calibrations with a single cylinder
  • Permeation Type Calibrator – Generate a desired gas in small quantities for an economical solution for a large number of sensors

Gas Sample Draw Panel 5392-21

  • Unitary Solution – House both gas sensor module and sampling in the same enclosure for ease-of-use
  • Remote Sampling – Provide monitoring of indoor areas that may be inaccessible for maintenance
  • Fast Loop & Bypass Sampling Method – Reduce sample delay time with improved response
  • IT Module Features – Include all features provided in Sentry IT modules for signal output and interface requirements

Rainshield 5311-00

  • External Shield – Protects a sensor from any direct exposure to rain, hosedown, and other splashing liquids

Duct Mount 5394-00

  • Duct Mounting – Mount and install a gas sensor module onto an air duct to maximize sensor range

Calibration Adapters 5360-00/5358-01

  • Ease-of-Use – Calibrate hard-to-reach sensor modules easily

Specifications for Gas Sensor Accessories

Specifications for Gas Cylinders 1260 Series

Type A Gas Cylinders (Combustible Gas – LEL, CO, H2, Air)

  • Dimensions (cylinder): 13.75 x 3.25 in. (34.9 x 8.2 cm)
  • Weight (cylinder): 2.3 lb. (1.05 Kg)
  • Cylinder Pressure: Max 1000 psig
  • Cylinder Volume: 3.6 cu. ft. (105 liters) at STP

Type A Gas Cylinders (H2S for 4101/5100-05)

  • Dimensions (cylinder) 13.5 x 3.5 in. (34.3 x 8.9 cm)
  • Weight (cylinder): 1.8 lb. (0.8 Kg)
  • Cylinder Pressure: Max 500 psig
  • Cylinder Volume: 2.0 cu. ft. (57 liters) at STP

Type B Gas Cylinders (SO2, NO2, NO)

  • Dimensions (cylinder): 16.25 x 4.0 in. (41.3 x 10.2 cm)
  • Weight (cylinder): 1.75 lb. (0.8 Kg)
  • Cylinder Pressure: Max 480 psig
  • Cylinder Volume: 2.6 cu. ft. (74 liters) at STP

Type C Gas Cylinders (Cl2)

  • Dimensions (cylinder): 12.25 x 3.25 in. (31.1 x 8.2 cm)
  • Weight (cylinder): 2.2 lb. (1.0 Kg)
  • Cylinder Pressure: Max 1800 psig
  • Cylinder Volume: 3.7 cu. ft. (104 liters) at STP

Specifications for Calibration Gas Deliver System 1200-26


  • 4.0 x 7.0 x 3.0 in. (10.2 x 17.8 x 7.6 cm)


  • 2.75 lb. (1.24 Kg) (including cylinder)

Flow Rate

  • 50-500 cc/min

Cylinder Pressure

  • Max 180 psi

Cylinder Volume

  • 0.27 cu. ft. (7.7 liters) at STP

Specifications for Gas Sample Draw Panel 5398-21


  • 110 VAC @ 1 amp


  • Oil-free, diaphragm type

Maximum Sample Draw

  • 600 feet (183 m) total length with ¼” tubing

Flow Rates

  • 0-500 cc/min. Adjustable sample to sensor

Maximum Operating Pressure

  • 20 psig


  • 32o to 110oF (0o to 43oC)


  • 3-way valve for Run and Calibration


  • Dry contact pump flow failure switch (contacts closed when flow is detected, open for alarm)


  • Coalescing filter for moisture knock-out

Tubing Connections

  • ¼” Tube Fittings for connection of:
    • Sample line
    • Calibration gas
    • Sample exhaust
    • Bypass exhaust

Enclosure Type

  • NEMA 4X Fiberglass with window

Dimensions (H x W x D)

  • 16.9 x 15.0 x 8.3 in. (42.9 x 38.1 x 21.1 cm)


  • 17.6 lb. (8.0 Kg) – without gas sensor module


  • Mounting provisions for all standard Sierra Monitor sensors


  • 1 year, excludes diaphragm assy

How to Purchase Gas Sensor Accessories

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