Sample-draw sensor/transmitter with pump

Sample-draw sensor/transmitter with pump
Производитель: RKI Instruments
Модель: GD-K7D2
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  • Over 30 toxic sensors to choose from
  • Built-in sampling pump
  • Electrochemical sensors for most semiconductor gases
  • 24VDC or 115VAC pump operation
  • Built-in battery for bias of sensors
  • Quick installation wall brackets
  • Easy replacement of pump and sensor (no tools required)
  • Narrow wall mount housing design
  • Front removal cover
  • Optional NEMA 4X housing available


  • Semiconductor
  • Chemical Processing
  • Laboratory
  • Manufacturing
  • HVAC

The GD-K7D2 is a complete sample drawing gas detector, providing long lasting monitoring for a wide range of toxic gases. Designed for easy maintenance access, the sensor and pump can be changed quickly and with no tools required. The GD-K7D2 enjoys the best reputation in the industry for the quality and longevity of this model and its sensors.
The heart of the GD-K7D2 is the electrochemical sensor. These field proven sensors are the best in the industry. Each GD-K7D2 sensor is aged and tested for up to 3 months, resulting in 3 to 5 years or more. The sensors are quick to respond, highly accurate and selective to the gas being monitored. The long life pump will provide many years of trouble free service, and allows the unit to be monitored up to 60 feet from the sampling point. A linear 4-20mA output is provided for signal transfer to a reliable RKI Beacon Series Controller, or to a customer supplied PLC or DCS system. An optional NEMA 4x enclosure is available for harsh environments.



Detection principle

Electrochemical cell

Detection method

Sample drawing type

Signal transmission

Analog transmission (4-20 mA)

Alarm response time

Approximately 10 - 15 seconds when exposed to gas concentration of 1.6 times alarm level for most gases (Same as T60)

Self diagnostic function

Trouble and low flow

Operation temp. & humidity

0 ~ 40°C, 30 ~ 85% RH

Applicable cable

Shielded cable 3C, 1.25 sq (18 gauge) (DC version), consult local requirements for AC pump


Wall mounting


24 VDC +/- 10%, Approx. 10W / 115VAC +/- 10%, 50/60hz (AC pump power only, 24VDC required for signal)


2.8” (W) x 6.7” (H) x 6.0” (D), approximately 4.4 lbs
70 mm (W) x 170 mm (H) x 153 mm (D), approximately 2 kg

Partial List Of Detectable Gases
Many other gases or ranges available. Contact RKI for gases or ranges not listed

Ammonia (NH3)

0 - 75.0 ppm

Arsine (AsH3 )

0 - 0.20 ppm (optional 0-1.00 ppm)

Chlorine (Cl2)

0 - 3.00 ppm

Chlorine Dioxide (ClO2)

0 - 1.00 ppm

Chlorine Trifluoride (ClF3)

0 - 1.00 ppm

Diborane (B2H6)

0 - 0.30 ppm

Fluorine (F2)

0 - 3.00 ppm

Germane (GeH4)

0 - 0.60 ppm

Hydrogen Bromide (HBr)

0 - 9.00 ppm

Hydrogen Cyanide (HCN)

0 - 30.0 ppm

Hydrogen Chloride (HCl)

0 - 15.0 ppm

Hydrogen Fluoride (HF)

0 - 9.00 ppm

Hydrogen Sulfide (H2S)

0 - 30.0 ppm (optional 0-1.00 ppm)

Nitric Oxide (NO)

0 - 100 ppm

Nitrogen Dioxide (NO2)

0 - 15.0 ppm

Ozone (O3)

0 - 0.60 ppm

Phosphine (PH3)

0 - 1.00 ppm

Silane (SiH4)

0 - 15.0 ppm

Sulfur Dioxide (SO2)

0 - 6.00 ppm