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The Model SD-1 series smart transmitter/ detector heads are sate of the art instruments housed in flameproof enclosure certified by ATEX. A simple Magnetic control Key is used to adjust and calibrate the instrument. Five different types of sensor can be used along with SD-1 to detect variety of Flammable, Toxic and Oxygen gases. SD-1 IR Type HS comes with HART output and is SIL2 compliant. Relay contacts for Alarms, Fault and 4-20 mA output is available standard in other models.

  • Features
  • Applications
  • Approvals
  • Specification
  • Accessories
  • Explosion Proof Class Exd IIC T5
  • ATEX / IECx approval
  • EN60079-29-1, IEC60079-29-1 by TIIS
  • IP65/67 ingress class
  • 4-20 mA linear output
  • Small, rugged, dust and weather proof construction
  • Electrical power saving (Maximum : 3W)
  • One man maintenance by Magnetic Key
  • Self diagnosis by microprocessor
  • LNG Terminal
  • Petro-refinery, Petrochemical Plants
  • Chemical Plants
  • Power Station, Gas Utilities
  • Iron and steel Works
Type Type GP Type NC Type GP Type NC Type GP Type NC -
Detection Principle Catalytic Combustion New Ceramic Catalytic Combustion New Ceramic Catalytic Combustion New Ceramic Semiconductor
Measuring Gas Combustible Gases Toxic or Combustible Gases
Sampling Method Diffusion Sample Drawing (Remote sampling pump is required) Air Aspiration Diffusion Sample Drawing (Remote Sampling pump is required) Air Aspiration
Flow Rate - 0.8~2.0L/min - 0.8~2.0L/min
Measuring Range 0~100% LEL 0~100% LEL* 0~100% LEL 0~100% LEL* 0~100% LEL 0~100% LEL* Refer to the list on the last page*
Display 7-seg digital LED (4 digits)
Alarm Setting 25%LEL (Standard) 25%LEL* (Standard) 25%LEL (Standard) 25%LEL* (Standard) 25%LEL (Standard) 25%LEL* (Standard) depends on the gas
Alarm Delay Time Approx 30 seconds when exposed to gas concentration of 1.6 times alarm level Approx within 30 to 60 seconds when exposed to gas concentration of 1.6 times alarm level (depends on the gas
Output Analog transmission (4-20mA), load resistance under 300 {2
Gas concentration signal/alarm contact (gas alert or fail alert or gas' fail common alert)
Alarm Contacts Normal open or normal close
Contact Capacity 30VDC 0.5V or 250VAC 0.5A (load resistance)
Applicable Cable CVVS
1.25sq or 2.0sq
3-core or CWS
1.25sq or 2.0sq
5-core (when in contact use)
Signal Transmission Distance & Cable MAX 1.25km with CVVS 1.25sq cable, MAX 2.0km with CVVS 2.0sq cable
Fail Alert Self Diagnosis Circuit failure / Sensor failure
Fail Alert Display Fail lamp (Yellow) / content indication
Power Source 24VDC (17VDC~26.4VDC) , consumed power approx 3W (MAX) 24VDC (17VDC~26.4VDC), consumed power approx 3.1W (MAX)
Operating Temperature & Humidity -20~+60°C/ below 95%RH (non condensing)
Dimension & Weight Diffusion = Approx 148(W) x 161 (H) x 88(0) mm , Approx 2.0kg
Sample drawing = Approx 148(W) x 177(H) x 88(0) mm , Approx 2.2kg
Air Aspiration = Approx 400(W) x 265(H) x 102(0) mm , Approx 5.6kg
Protection Level About IP65 (except the sensor parts)
Explosion Proof Exd II CT5
**EN60079-29-1, IEC60079-29-1 by TIIS

*Please contact RIKEN KEIKI
**Applied to SO-1 type GP for H2, CH4, i-C4Hl0, C3Ha

Specification subject to change without notice

Standard Accessories Control lever
Control key
Optional Accessories Sun Shade Cover (For pole stand) -
Sun Shade Cover (For wall) -
Drip Proof Cap (Round type) - -
Calibration Cap - -
Drip Proof Cover (Box type) - -

Specification subject to change without notice.

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