35-3001


35-3001 Category

The 35-3001 series is a compact sample draw detector assembly with a built-in pump that is powered from 24VDC. This unit features a NEMA 4X enclosure, making it dust, water and corrosion resistant. It also features a low flow alarm which warns of any obstructions or restrictions in the flow system. Combustibles, oxygen, and carbon dioxide versions are available with or without a 4-20 mA transmitter. H2S and CO versions both have 4-20mA outputs. The 35-3001 is also available in many dual sensor configurations.

The 35-3001 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).

  • Available in LEL, O2, H2S, CO, CO2, H2 (ppm or LEL)
  • Multigas versions available with sensors in one enclosure
  • Internal sample pump with 100’ range
  • Flowmeter and LED’s for operational status
  • Low flow indication
  • NEMA 4X enclosure
  • Operates on 24VDC input
  • Optional 4-20mA output
  • Petrochemical plants
  • Refineries
  • Water & wastewater treatment plants
  • Pulp & paper mills
  • Gas, telephone, & electric utilities
  • Parking garages
  • Manufacturing facilities
  • Steel
  • Automotive
  • HVAC
SpecificationsLELLELO2H2SCOH2CO2
Sensor TypeCatalyticInfraredGalvanic cellElectrochemicalMOSInfrared
Measuring Range0-100% LEL0-100% LEL for CH4 and HC’s0-25% Vol.0-100 ppm0-500 ppm0-2000 ppm0 - 5000 ppm
0 - 5.0% Vol.
0 - 50% Vol.
0 - 100% Vol.
Signal OutputRKI direct connect sensors (requires RKI controller)
Optional 4-20mA output (standard for CO/H2S)
Operating Voltage24VDC nominal (18.5 – 30VDC)
Max Current Draw250 mA 24VDC
LocationIndoor or outdoor
Temperature-4 to 122° F (-20 to 50°C)
Humidity0 – 95% RH non condensing
HousingGrey polycarbonate wall-mount hinged NEMA 4X
DimensionsHeight8.5”216 mm
Width7.0”178 mm
Depth4.3”109 mm
Sampling MethodInternal sample draw pump
Maximum Sample Length100 ft.
Sample Connections1/4” OD rigid tubing (inlet and exhaust)
DisplayFlow meter, LED’s for pilot and fail
WarrantyOne year, materials and workmanship
Available Configurations
Single ChannelMulti Channel
No TransmitterLELLEL / O2LEL / H2SLEL / COLEL / CO2
IR LELIR LEL / O2IR LEL / H2SIR LEL / COIR vol / CO2
IR VolIR vol / O2IR vol / H2SIR vol / CO
H2 LELLEL / IR LELO2 / H2SO2 / CO
O2
CO2
With TransmitterLELLEL / H2SLEL / CO
IR LELIR LEL / H2SIR LEL / CO
IR VolIR vol / H2SIR vol / CO
H2 LELO2 / H2SO2 / CO
H2S
CO
O2
CO2