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Cylindrical silver metal sensor with gold pins and black base

BFKK

BFKK S+4OX Oxygen Sensor Remover

SKU CH-H5TS-388BW

Replacement oxygen cell for S+4OX and S+40X gas detectors, measuring 0–25 % O₂ with a 0.10 ±0.03 mA signal and RoHS ISO 9001 certification

  • Genuine DDS part ensures matched signals for S+4OX/S+40X detectors
  • Measures 0–25% oxygen with 0.10 ±0.03 mA output signal
  • Withstands up to 30% oxygen overload without damage
  • Operates from -30 to +50 °C across 800–1200 mbar pressure
  • Certified to RoHS and ISO 9001 with 5–95% RH humidity tolerance

Genuine DDS Oxygen Cell for Gas Detectors

This S+4OX sensor is a genuine DDS replacement cell designed for fixed and portable gas detectors that require the S+4OX or S+40X form factor. It delivers an output signal of 0.10 ± 0.03 mA across a measurement range of 0 to 25% oxygen. The unit mounts via a PIN interface and operates within a pressure range of 800 to 1200 mbar. It holds RoHS and ISO 9001 certification.

Stable Output Under Continuous Monitoring

Under sustained operation the cell maintains its specified signal tolerance of ±0.03 mA throughout the full 0 to 25% oxygen span. It withstands a maximum overload of 30% oxygen without damage. The recommended load resistor of 100 ohms ensures consistent signal linearity during long-term deployment in coal, steel or industrial safety applications.

Wide Environmental Tolerance in Normal Use

The sensor functions continuously from -30 to +50 °C and tolerates humidity from 5% to 95% RH non-condensing. These limits cover typical indoor and outdoor detector placements without active thermal management. Power draw is defined by the microamp output signal into the 100 ohm load, imposing negligible demand on the host instrument's supply.

Highlights

  • Genuine DDS part ensures matched signals for S+4OX/S+40X detectors
  • Measures 0–25% oxygen with 0.10 ±0.03 mA output signal
  • Withstands up to 30% oxygen overload without damage
  • Operates from -30 to +50 °C across 800–1200 mbar pressure
  • Certified to RoHS and ISO 9001 with 5–95% RH humidity tolerance

Specifications

No published specifications for this item yet.

Questions about this item

How much power does the S+4OX sensor draw when it runs continuously in a fixed gas detector?

The sensor outputs 0.10 ± 0.03 mA, so its continuous power draw is negligible for the detector's supply.

What detector interface must my instrument provide for the S+4OX to operate correctly?

The sensor uses a PIN mounting type and requires a 100 ohm load resistor on the detector's input.

Will the S+4OX work reliably in an older detector that was calibrated for a different oxygen cell?

It is built to match original S+4OX/S+40X performance, so it fits existing detectors without recalibration.

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