Sample-Draw Sensor / Transmitter

Datasheet • 115VAC Manual • 24VDC Manual • GD-K7D24X Manual

GD-K7D2 The GD-K7D2 is RKI’s workhorse sample draw assembly for use with a wide variety of electrochemical sensors for toxic gas detection. It is designed for simple servicing in that the sensor and pump can be easily replaced in less than one minute each. The GD-K7D2 is normally supplied with a 115 VAC pump, which requires local AC power, and the sensor signal output is 4-20 mA (24 VDC, 2 wire loop). A 24 VDC pump is also available, in which the head uses a 3 wire connection to a controller or PLC. The compact design of the unit requires minimum mounting space and the front removal cover allows for installation and ease of service in tight spaces. Easy to install, operate, and maintain, the GD-K7D2 is RKI’s most popular sample draw head for toxic gases.

Features

Built-in sampling pump
Complete sensor and pump in one housing
Quick installation wall brackets
Easy sensor and pump removal for maintenance
Front removal cover
Built-in flow indicator and low flow alarm
Quick response sensors
Over 30 sensors to choose from
Built-in battery for bias of sensors
Optional NEMA 4X housing available

Applications

Semiconductor
Chemical Processing
Laboratory
Manufacturing

Specifications

Detection Principle	Electrochemical cell
Sampling Method	Sample drawing type
Sample Flow Rate	0.5 lpm
Signal Transmission	Analog transmission (4-20 mA) Two wire digital transmission
Alarm Response Time	Approximately 30 seconds when exposed to gas concentration of 1.6 times alarm level for most gases (Same as T60)
Self Diagnosistic Function	Low flow relay contact
Operating Conditions	0 - 40^•C, 30 - 85% R. H.
Power Requirements	24 VDC or 115 VAC versions available
Applicable Cable	Shielded cable 3C, 1.25 sq (18 gauge) for power Shielded twisted one pair cable, 1.25 sq (18 gauge) for signal
Enclosure	Wall mounting, non-explosion proof
Dimensions	2.75" (W) x 6.45" (H) x 6.0" (D), approximately 4 lbs 70 mm (W) x 164 mm (H) x 153 mm (D), approximately 1.8 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
Boron Trichloride (BCl₃)	0 - 15.0 ppm
Carbon Monoxide (CO)	0 - 300 ppm
Chlorine (Cl₂)	0 - 3.0 ppm
Chlorine Dioxide (ClO₂)	0 - 1.00 ppm
Chlorine Trifluoride (ClF₃)	0 - 1.00 ppm
Diborane (B₂H₆)	0 - 0.3 ppm
Fluorine (F₂)	0 - 6.0 ppm
Hydrogen Chloride (HCl)	0 - 15.0 ppm
Hydrogen Fluoride (HF)	0 - 9.0 ppm
Hydrogen Peroxide (H₂O₂)	0 - 3.00 ppm
Hydrogen Sulfide (H₂S)	0 -100.0 ppm
Nitric Oxide (NO)	0 -100.0 ppm
Nitrogen Dioxide (NO₂)	0 - 15.0 ppm
Ozone (O₃)	0 - 1.0 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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