SD-1RI (Type HS) Smart Transmitter / Gas Detector

The Riken Keiki SD-1RI (Type HS) Smart Transmitter / Gas Detector line of smart transmitters features state-of-the-art gas detectors with durable flameproof enclosure, best operability and maximum safety, especially in hydrogen/acethylene atmospheres.

A simple magnetic control key is placed over clear marked positions on the surface plate to test and adjust the instrument without opening the transmitter in situations with the danger of explosion. This “single-man-calibration” is already in use and appreciated with other RKI gas detectors for easy maintenance. 

The built-in microprocessor features a self-diagnosis functions and automatic zero setting to minimise maintenance work and costs compared to other sensors.

Dual alarm contacts or trouble alarm contact are provided for activation of external buzzer or alarm light. Powered by 24VDC, the unit has a 4-20mA output for communication to external controllers, for external readouts or alarming devices. 


CategoryFixed gas detector
TypeStand-alone gas detector
Detection principleIR
Sampling methodDiffusion
Explosion proofFlameproof enclosure
ApprovalsATEX, IECEx, CE, TIIS

  • For combustible gases
  • Longlife RKI sensors
  • Dual alarm contacts (relais)
  • 4-20mA linear output
  • Self diagnosis + Single-Man-Calibration
  • Flameproof enclosure Exd II CT5, IP65
  • ATEX approved

Customer Service

Sebastian Kelderman