Sample Draw Sensor / Transmitter

Datasheet • LEL Manual • O2 Manual

The 35-3000RK (A) series is a compact sample draw detector assembly with a built-in pump that accepts a 24VDC input. This unit features a NEMA 4X enclosure making it dust, water and corrosion resistant. It also features a flowmeter with adjustable flow and a low flow alarm, which warns of any obstructions or restrictions in the flow system. Combustibles, oxygen, hydrogen sulfide and carbon monoxide versions are available with or without a 4-20 mA transmitter. The 35-3000RK (A) is also available with both LEL and oxygen sensors in one unit.

The 35-3000RK (A) is capable of single person calibrations and remote sampling at up to 5,000 ft. from a controller, and interfacing to any RKI or third party control system (utilizing a 4-20 mA feedback signal). Large versions of this efficient sample draw system are available with up to four sensors, LEL, O2, H2S and CO all in one enclosure. This is a very cost effective way of monitoring for several gases that may be in the same place.

Features

NEMA 4X enclosure
Long life pump
Flowmeter and LED’s for operational status
Low flow indication
Operates on 24VDC input
Larger versions available with up to 4 sensor capability in one enclosure
Available in LEL, O2, H2S, CO, H2, HC (ppm)
LEL and O2 available with or without
transmitter
LEL and O2 available together in one
standard compact enclosure

Applications

Petrochemical plants
Refineries
Water & wastewater treatment plants
Pulp & paper mills
Gas, telephone, & electric utilities
Parking garages
Manufacturing facilities
Steel
Automotive
HVAC

Specifications (CO and HC version below)

Part #	LEL 35-3000RKA-LEL	O₂ 35-3000RKA-O2	H₂S 35-3000RKA-H2S
Min Operating Voltage	23 VDC
Max Operating Voltage	30 VDC
Max Current Draw	250 mA	200 mA
	0 - 100% LEL	0 - 25% Volume	0 - 100 ppm
Signal Output	4 mA at 0% LEL 20 mA at 100% LEL	4 mA at 0 % Oxygen 20 mA at 25% Oxygen	4 mA at 0 ppm H₂S 20 mA at 100 ppm H 2 S
Response Time	30 seconds to 90% of concentration	20 seconds to 90% of concentration	45 seconds to 90% of concentration
Operating Environment
Location	Indoor or outdoor
Temperature	30 to 120° F
Humidity	0 - 99% RH, non condensing
Housing	Wall mounting grey polycarbonate with hinged cover. NEMA 4X

Sensor Type	Catalytic Combustion	Galvanic Cell	Electrochemical
Life Expectancy	1 to 2 years normal service	2 years normal service	2 years normal service
Dimensions	Height 8.5" (216 mm) Width 7.0" (178 mm) Depth 4.3" (109 mm)
Sampling Method	Sample draw pump
Display	Flow meter, LED's for operational status; pilot, fail
Warranty	One year, materials and workmanship

Part #	CO 35-3000RKA-CO	HC 35-3000RKA-11
Min Operating Voltage	23 VDC
Max Operating Voltage	30 VDC
Max Current Draw	200 mA	250 mA
Measuring Range	0 - 500 ppm	0 - 2000 ppm
Signal Output	4 mA at 0 ppm CO 20 mA at 300 ppm CO	4 mA at 0 ppm 20 mA at 2000 ppm ( Linear)
Response Time	30 seconds to 90% of concentration
Operating Environment
Location	Indoor or outdoor
Temperature	30 to 120° F
Humidity	0 - 99% RH, non condensing	5 - 95% RH, non condensing
Housing	Wall mounting grey polycarbonate with hinged cover. NEMA 4X

Sensor Type	Electrochemical	Metal Oxide Semiconductor
Life Expectancy	2 to 3 years normal service	5 to 10 years typical
Dimensions	Height 8.5" (216 mm) Width 7.0" (178 mm) Depth 4.3" (109 mm)
Sampling Method	Sample draw pump
Display	Flow meter, LED's for operational status; pilot, fail
Warranty	One year, materials and workmanship

Multi-gas Versions
LEL/O2/H2S/CO	35-3010RKA-01
LEL/O2/H2S	35-3010RKA-02
LEL/O2/CO	35-3010RKA-03

Non-transmitter Versions
LEL	35-3000RK-LEL
O2	35-3000RK-OXY
LEL/O2	35-3000RK-LEL/O

* Specifications subject to change without notice.
Made in USA.

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