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| Smart Sensor/Transmitter with Readout |
GD-K71D Series |
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- LED digital display
- Sensor information and calibration is stored within sensor memory
- Several data transmission options available
- Zero suppression and correction
- Housing design for narrow wall mounting locations
- Self-diagnostic functions by microprocessor
- Electrochemical sensors for most semiconductor gases
- Built-in sampling pump
- Easy replacement of pump and sensor
- Two alarm levels with relays, plus trouble alarm
- 24VDC operation
- Optional NEMA 4X housing available
- Semiconductor
- Chemical Processing
- Laboratory
- Manufacturing
- HVAC
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| The GD-K71D is a complete sample drawing gas monitor, including digital readout and alarm relays. A new gas sensor technology using an intelligent sensor for remote location calibration and setup is used. The new GD-K71D sensors are designed to provide a longer time period between calibrations. Calibration intervals have been extended to12 months of on-line service which equates to reduced maintenance cost. In addition, the sensors can be calibrated away from the gas detector installation, for example in a service area or off site. This eliminates the inconvenience of having calibration gases in the fab or monitoring location. GD-K71D easily connects to an existing PLC system and is ideal for applications needing a local readout or where a relay control is needed. The automatic zero correction software provides excellent long term stability and minimizes false alarms due to zero drift. |

| Detection Principle |
Electrochemical cell |
| Detection Method |
Sample drawing type |
Signal
Transmission |
Analog transmission (4-20 mA) digital transmission (optional DeviceNet) |
| Display |
Digital LED display of gas concentration, 4 digits |
| Gas Alarms |
Two alarm levels: 1st alarm (Yellow LED), 2nd alarm (Red LED) |
Dry Outputs
For Remote
Alarms |
Dry contact relay for 1st, 2nd, and trouble alarms (Normally Open or Normally Closed) |
| 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 Diagnosistic
Function |
Trouble, low flow, system failure, communication error, and zero correction |
| Operating Conditions |
0 - 40C, 30 - 85% R. H. |
| Power Requirements |
24 VDC +/- 10%, Approx. 10W |
| Applicable Cable |
Shielded cable 3C, 1.25 sq (18 gauge) |
| Enclosure |
Wall mounting |
| Dimensions |
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
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Ammonia (NH3)
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0 - 75.0 ppm |
| Arsine (AsH3 ) |
0 - 0.20 ppm |
| Chlorine (Cl2) |
0 - 3.0 ppm |
| Chlorine Dioxide (ClO2) |
0 - 1.00 ppm |
| Chlorine Trifluoride (ClF3) |
0 - 1.00 ppm |
| Diborane (B2H6) |
0 - 0.30 ppm |
| Fluorine (F2) |
0 - 3.0 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 - 9.0 ppm |
| Hydrogen Sulfide (H2S) |
0 - 30.0 ppm (optional 0-1.00 ppm) |
| Nitric Oxide (NO) |
0 -100.0 ppm |
| Nitrogen Dioxide (NO2) |
0 - 15.0 ppm |
| Ozone (O3) |
0 - 0.60 ppm |
| Phosphine (PH3) |
0 - 1.0 ppm |
| Silane (SiH4) |
0 - 15.0 ppm |
| Sulfur Dioxide (SO2) |
0 - 30.0 ppm |
Specifications subject to change without notice.
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