CTX 300

Oldham CTX 300 Fixed Gas Detector

Code: CTX 300
  • Toxic gases or oxygen
  • Minimal Maintenance
  • Interchangeable and pre-calibrated sensor modules

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The Oldham CTX 300 can detect O2, CO2, toxic and refrigerant gases. Choose from a range of sensors (infrared, electrochemical, semiconductor) according to your application needs. It is also available with or without display.

Sensor replacement does not require any special menu access. Just replace the sensor without even powering down the transmitter.

As the only consumable element, the CTX 300 sensor is easily replaceable. New sensors come pre-calibrated from the factory. So during the sensor exchange, no calibration gas is required, nor are the detector or remote central controller adjustments necessary. Oldham is a Teledyne brand.

  • Durable in harsh environments
  • Up to 5 years of life for the O2 sensor
  • CO2 detection over three different ranges: 0-5000 ppm, 0-5% vol. and 0-100% vol
  • Optional LCD
  • Approvals EMC according to EN50270
  • Ingress Protection IP 54
  • Weight 520 g (18.2oz)
  • Dimensions 130 x 136 x 69 (lxhxd) in mm, (5.12″x 5.35″ x 2.72″)

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    Title Size
    GTX 300 Brochure 255 KB
    CTX 300 Manual 1 MB

    Additional information

    Weight 0.09 kg

    Ordering Information

    CTX 300 without display 4-20mA – with electrochemical sensor supplied with cable gland

    ASH3 Arsine
    CTX300-243 ASH3, without display, range 0-1ppm

    C2H4O Ethylene oxide
    WC30-248 C2H4O, without display, range 0-100ppm

    CH2O
    CTX300-247 CH2O, without display, range 0-50ppm

    Cl2 Chlorine
    WC30CL2 Cl2, without display, range 0-10ppm

    ClO2 Chlorine dioxide
    WC30CLO ClO2, without display, range 0-3ppm

    CO Carbon monoxide
    WC30COA CO, without display range 0-100ppm
    WC30COB CO, without display, range 0-300ppm
    WC30COC CO, without display, range 0-1000ppm
    WC30COD CO, without display, range 0-1 %

    COCl2 Phosgene
    WC30CCL COCl2, without display, range 0-3 ppm

    ETO
    WC30OET Ethylene Oxide, without display, range 0-30ppm

    F2 Fluorine
    WC30F2A F2, without display, range 0-1ppm

    H2 Hydrogen
    WC30H2A H2, without display, range 0-2000ppm
    WC30H2B H2, without display, range 0-2 %

    H2S Hydrogen sulfide
    WC30HSA H2S, without display, range 0-30ppm
    WC30HSB H2S, without display, range 0-100ppm
    WC30HSC H2S, without display, range 0-1000ppm

    HCl Hydrogen chloride
    WC30HLA HCl, without display, range 0-30ppm
    WC30HLB HCl, without display, range 0-100ppm

    HCN Hydrogen cyanide
    WC30HNA HCN, without display, range 0-10ppm

    CTX 300 without display 4-20mA – with electrochemical sensor supplied with cable gland

    HCN Hydrogen cyanide
    WC30HNB HCN, without display, range 0-30ppm

    HF Hydrogen fluoride
    WC30HFA HF, without display, range 0-10ppm

    NH3 Ammonia
    WC30NH1 NH3, without display, range 0-1000ppm
    WC30NH1F NH3 for low-temperature application (-40°C/-40°F), without display, range 0 1000ppm
    WC30NH2 NH3, without display, range 0-5000ppm
    WC30NH3 NH3, without display, range 0-100ppm
    WC30NH3F NH3 for low-temperature application (-40°C/-40°F), without display, range 0-100ppm

    NO Nitric oxide
    WC30NOA NO, without display, range 0-100ppm
    WC30NOB NO, without display, range 0-300ppm
    WC30NOC NO, without display, range 0-1000ppm

    NO2 Nitrogen dioxide
    WC30N2A NO2, without display, range 0-10ppm
    WC30N2B NO2, without display, range 0-30ppm
    WC30N3B NO2, without display, range 0-100ppm

    O2 Oxygen
    WC30O2F O2, with standard 2 year sensor lifetime, without display, range 0-30 %, -20°C to +50°C
    WC30O2G O2, with long life 5 year sensor lifetime, without display, range 0-30 %, -40°C to +50°C
    WC30O2S O2, without display, range 0-100 % vol

    O3 Ozone
    WC30O3A O3, without display, range 0-1ppm

    PH3 Phosphine
    6513584 PH3, without display, range 0-1000ppm
    WC30PH3 PH3, without display, range 0-1ppm

    SiH4
    WC30SIA SiH4, without display, range 0-50ppm

    CTX 300 without display 4-20mA – with electrochemical sensor supplied with cable gland

    SO2 Sulfur dioxide
    WC30SOA SO2, without display, range 0-10ppm
    WC30SOB SO2, without display, range 0-30ppm
    WC30SOC SO2, without display, range 0-100ppm

    CTX 300 without display 4-20mA – with infrared sensor supplied with cable gland

    CO2 Carbon dioxide
    WC30CO2A CO2, without display, range 0-5000ppm
    WC30CO2B CO2, without display, range 0-5.00 % vol
    WC30CO2C CO2, without display, range 0-100 % vol

    CTX 300 without display 4-20mA – with semi-conductor sensor supplied with cable gland

    2-Butanone
    CTX300-659 analogue transmitter without display, 0-500ppm 2-Butanone (MEK)

    CH2Cl2 Dichloromethane
    CTX300-507 analogue transmitter without display, 0-500ppm Dichloromethane (Methylene chloride)

    Chloromethane
    CTX300-508 analogue transmitter without display, 0-500ppm Chloromethane (Methylchloride)

    Ethanol
    CTX300-654 analogue transmitter, without display, 0-5000ppm Ethanol
    CTX300-656 analogue transmitter without display, 0-500ppm Ethanol

    FX56
    CTX300-510 analogue transmitter, without display, 0-2000ppm FX56

    Isopropanol
    CTX300-658 analogue transmitter without display, 0-500ppm Isopropanol

    R11
    CTX300-505 analogue transmitter, without display, 0-1% volume R11

    R12
    CTX300-500 analogue transmitter, without display, 0-1% volume R12

    R123
    CTX300-509 analogue transmitter, without display, 0-2000ppm R123

    CTX 300 without display 4-20mA – with semi-conductor sensor supplied with cable gland

    R1234yf
    CTX300-662 analogue transmitter, without display, 0-1,000ppm HFO-1234yf

    R1234ze
    CTX300-525 analogue transmitter, without display, 0-1,000ppm HFO-1234ze

    R134a Freon R134A
    CTX300-502 analogue transmitter, without display, 0-2000ppm R134A

    R143a
    CTX300-511 analogue transmitter, without display, 0-2000ppm R143A

    R22 Chlorodifluoromethane (R22)
    CTX300-501 analogue transmitter, without display, 0-2000ppm R22

    R23 Trifluoromethane (R23)
    CTX300-506 analogue transmitter, without display, 0-1% volume R23

    R245fa
    CTX300-521 analogue transmitter, without display, 0-1000ppm R245FA

    R32
    CTX300-515 analogue transmitter, without display, 0-1000ppm R32

    R404a
    CTX300-512 analogue transmitter, without display, 0-2000ppm R404A

    R407c
    CTX300-517 analogue transmitter, without display, 0-1000ppm R407C

    R407F
    CTX300-519 analogue transmitter, without display, 0-1000ppm R407F

    R408a
    CTX300-518 analogue transmitter, without display, 0-4000ppm R408A

    R410a
    CTX300-514 analogue transmitter, without display, 0-1000ppm R410A

    R422d
    CTX300-524 analogue transmitter, without display, 0-4000ppm R422D

    R434a
    CTX300-520 analogue transmitter, without display, 0-4000ppm R434A (RS45)

    R507
    CTX300-513 analogue transmitter, without display, 0-2000ppm R507

    Styrene
    CTX300-661 analogue transmitter, without display, 0-500ppm Styrene

    CTX 300 without display 4-20mA – with semi-conductor sensor supplied with cable gland

    Toluene
    CTX300-652 analogue transmitter, without display, 0-2000ppm Toluene
    CTX300-657 analogue transmitter without display, 0-500ppm Toluene

    Trichloroethylene
    CTX300-655 analogue transmitter, without display, 0-500ppm Trichloroethylene

    Xylene
    CTX300-653 analogue transmitter, without display, 0-2000ppm Xylene
    CTX300-660 analogue transmitter without display, 0-500ppm Xylene

    CTX 300 with display 4-20mA – with electrochemical sensor supplied with cable gland

    Cl2 Chlorine
    WC3ACL2 Cl2, with display, range 0-10ppm

    ClO2 Chlorine dioxide
    WC3ACLO ClO2, with display, range 0-3 ppm

    CO Carbon monoxide
    WC3ACOA CO, with display, range 0-100ppm
    WC3ACOB CO, with display, range 0-300ppm
    WC3ACOC CO, with display, range 0-1000ppm
    WC3ACOD CO, with display, range 0-1 %

    COCl2 Phosgene
    WC3ACCL COCl2, with display, range 0-3 ppm

    ETO
    WC3AOET Ethylene Oxide, with display, range 0-30ppm

    F2 Fluorine
    WC3AF2A F2, with display, range 0-1ppm

    H2 Hydrogen
    WC3AH2B H2, with display, range 0-2% vol
    WC3AH2S H2, with display, range 0-2000ppm
    WC3AH3B H2, with display, range 0-4% vol

    H2S Hydrogen sulfide
    WC3AHSA H2S, with display, range 0-30ppm
    WC3AHSB H2S, with display, range 0-100ppm

    CTX 300 with display 4-20mA – with electrochemical sensor supplied with cable gland

    H2S Hydrogen sulfide
    WC3AHSC H2S, with display, range 0-1000ppm

    HCl Hydrogen chloride
    WC3AHLA HCl, with display, range 0-30ppm
    WC3AHLB HCl, with display, range 0-100ppm

    HCN Hydrogen cyanide
    WC3AHNA HCN, with display, range 0-10ppm
    WC3AHNB HCN, with display, range 0-30ppm

    HF Hydrogen fluoride
    WC3AHFA HF, with display, range 0-10ppm

    HNO3
    CTX300-262 HNO3, without display, range 0-10ppm

    NH3 Ammonia
    WC3ANH1 NH3, with display, range 0-1000ppm
    WC3ANH3 NH3, with display, range 0-100ppm

    NO Nitric oxide
    WC3ANOA NO, with display, range 0-100ppm
    WC3ANOB NO, with display, range 0-300ppm
    WC3ANOC NO, with display, range 0-1000ppm
    WC3ANOD NO, with display, range 0-30ppm

    NO2 Nitrogen dioxide
    WC3AN2A NO2, with display, range 0-10ppm
    WC3AN2B NO2, with display, range 0-30ppm

    O2 Oxygen
    B301312 O2 Special for Helium enrichment, without display, range 0-30% vol
    WC3AO2F O2, with standard 2 year sensor lifetime, with display, range 0-30 % vol, -20°C to +50°C
    WC3AO2G O2, with long life 5 year sensor lifetime, with display, range 0-30 % vol, -20°C to +50°C
    WC3AO2S O2, with display, range 0-100% vol

    O3 Ozone
    WC3AO3A O3, with display, range 0-1ppm

    CTX 300 with display 4-20mA – with electrochemical sensor supplied with cable gland

    PH3 Phosphine
    WC3APH3 PH3, with display, range 0-1ppm

    SO2 Sulfur dioxide
    WC3ASOA SO2, with display, range 0-10ppm
    WC3ASOB SO2, with display, range 0-30ppm
    WC3ASOC SO2, with display, range 0-100ppm

    CTX 300 with display 4-20mA – with Infrared sensor supplied with cable gland

    CO2 Carbon dioxide
    WC3ACO2A CO2, with display, range 0-0.50 % vol
    WC3ACO2B CO2, with display, range 0-5.00 % vol
    WC3ACO2C CO2, with display, range 0-100 % vol

    CTX 300 accessories

    Calibration
    6327906 Remote calibration cup
    6331141 Calibration cup (all except OLCT-IR, CTX300 with semi-conductor sensor & 700 Series, all gases)
    6331171 Calibration cup for semi-conductor CTX 300 versions
    6335918 Humidifier kit for transmitters with semi-conductor sensor

    Installation
    6322420 CEX/CTX 300 , OLC(T)40, 50, 60 and 100 ceiling-mount
    6323607 Gas collector
    6793322 Universal pitot tube with DN 80 flange (requires a sampling cup)
    6793718 CTX300, OLC(T) 50, 100, universal mounting Adapter Plate

    Protection
    6123716 Sunshield
    6123717 Shock-guard protector
    6331166 Splash guard
    6335953 PTFE water barrier
    6797902 300 series wall-mount protector

    Sampling
    6327905 Sampling cup

    Replacement Sensors

    6313544 Replacement sensor for CTX 300, R134a, R11, R23, R143a, R404a, R507, R410a, R32,R407c, R408a (Semi-conductor)
    6313545 Replacement sensor for CTX 300, Methyl chloride 0-500ppm (Semi-conductor)
    6313546 Replacement sensor for CTX 300, Solvants (Semi-conductor)
    6313547 Replacement sensor for CTX 300, R22 (0-2000ppm) – R12 (0-1%) (Semi-conductor)
    6793464 Replacement sensor for CTX 300, COV 0-500ppm (Semi-conductor)

    ASH3 Arsine
    6314185 Replacement sensor for CTX 300, ASH3, range 0-1ppm (Electrochemical)

    C2H4O Ethylene oxide
    6313961 Replacement sensor for CTX 300, C2H4 (ETHYLENE), range 0-1000ppm (Electrochemical)

    Cl2 Chlorine
    6313649 Replacement sensor for CTX 300, Cl2, range 0-10ppm (Electrochemical)
    6314002 Replacement sensor for CTX 300, Cl2, range 0-30ppm (Electrochemical)

    ClO2 Chlorine dioxide
    6313678 Replacement sensor for CTX 300, ClO2, range 0-3ppm (Electrochemical)

    CO Carbon monoxide
    6313627 Replacement sensor for CTX 300, CO, range 0-100ppm (Electrochemical)
    6313628 Replacement sensor for CTX 300, CO, range 0-300ppm (Electrochemical)
    6313629 Replacement sensor for CTX 300, CO, range 0-1000ppm (Electrochemical)
    6313631 Replacement sensor for CTX 300, CO, range 0-1 % (Electrochemical)
    6313915 Replacement sensor for CTX 300, CO, range 0-2000ppm (Electrochemical)

    CO2 Carbon dioxide
    6314191 Replacement sensor for CTX 300, CO2, range 0-5% vol. (CTX 300 delivered since July of 2015) (InfraRed)
    6314192 Replacement sensor for CTX 300, CO2, range 0-100% vol. (CTX 300 delivered since July of 2015) (InfraRed)
    6314193 Replacement sensor for CTX 300, CO2, range 0-5000ppm (CTX 300 delivered since July of 2015) (InfraRed)

    ETO
    6313645 Replacement sensor for CTX 300, ETO, range 0-30ppm (Electrochemical)

    F2 Fluorine
    6313860 Replacement sensor for CTX 300, F2, range 0-1ppm (Electrochemical)

    Formaldéhyde
    6314183 Replacement sensor for CTX 300, Formaldéhyde, range 0-50ppm (Electrochemical)

    H2 Hydrogen
    6313650 Replacement sensor for CTX 300, H2, range 0-2000ppm (Electrochemical)
    6313651 Replacement sensor for CTX 300, H2, range 0-2 % vol (Electrochemical)

    H2S Hydrogen sulfide
    6313633 Replacement sensor for CTX 300, H2S, range 0-30ppm (Electrochemical)
    6313634 Replacement sensor for CTX 300, H2S, range 0-100ppm (Electrochemical)
    6313635 Replacement sensor for CTX 300, H2S, range 0-1000ppm (Electrochemical)
    6313934 Replacement sensor for CTX 300, H2S SP, range 0-100ppm (Electrochemical)

    HCl Hydrogen chloride
    6313652 Replacement sensor for CTX 300, HCl, range 0-30ppm (Electrochemical)
    6313653 Replacement sensor for CTX 300, HCl, range 0-100ppm (Electrochemical)

    HCN Hydrogen cyanide
    6313654 Replacement sensor for CTX 300, HCN, range 0-10ppm (Electrochemical)
    6313655 Replacement sensor for CTX 300, HCN, range 0-30ppm (Electrochemical)

    HF Hydrogen fluoride
    6313675 Replacement sensor for CTX 300, HF, range 0-10ppm (Electrochemical)

    NH3 Ammonia
    6313656 Replacement sensor for CTX 300, NH3, range 0-100ppm (Electrochemical)
    6313657 Replacement sensor for CTX 300, NH3, range 0-1000ppm (Electrochemical)
    6313850 Replacement sensor for CTX 300, NH3, range 0-100ppm, low temperature, application -40°C/-40°F (Electrochemical)
    6313893 Replacement sensor for CTX 300, NH3, range 0-5000ppm (Electrochemical)
    6314127 Replacement sensor for CTX 300, NH3, range 0-1000ppm low temperature, application -40°C/-40°F (Electrochemical)

    NO Nitric oxide
    6313636 Replacement sensor for CTX 300, NO, range 0-100ppm (Electrochemical)
    6313637 Replacement sensor for CTX 300, NO, range 0-300ppm (Electrochemical)
    6313638 Replacement sensor for CTX 300, NO, range 0-1000ppm (Electrochemical)
    B301090 Replacement sensor for CTX 300, NO, range 0-30ppm (Electrochemical)

    NO2 Nitrogen dioxide
    6313639 Replacement sensor for CTX 300, NO2, range 0-10ppm (Electrochemical)
    6313640 Replacement sensor for CTX 300, NO2, range 0-30ppm (Electrochemical)
    6314001 Replacement sensor for CTX 300, NO2, range 0-100ppm (Electrochemical)

    O2 Oxygen
    6313660 Replacement sensor for CTX 300, O2 special, range 0-100% Vol (Electrochemical)
    6313867 Replacement sensor for CTX 300, O2, range 0-30% Vol. – Wingas (Electrochemical)
    6313C2A Replacement sensor for CTX 300, O2, range 0-30% Vol. (2 year sensor lifetime) (Electrochemical)
    6313C5A Replacement sensor for CTX 300, O2, range 0-30% Vol. (5 year sensor lifetime) (Electrochemical)
    B301072 CTX 300 O2 Special for Helium enrichment, with display, range 0-30% vol
    B301083 Replacement sensor for CTX 300, O2 special, range 0-30% Vol (O2 deficiency following a helium leak) (Electrochemical)

    O3 Ozone
    6313676 Replacement sensor for CTX 300, O3, range 0-1ppm (Electrochemical)

    PH3 Phosphine
    6313677 Replacement sensor for CTX 300, PH3, range 0-1ppm (Electrochemical)
    6313919 Replacement sensor for CTX 300, PH3, range 0-1000ppm (Electrochemical)

    SiH4
    6313834 Replacement sensor for CTX 300, SIH4, range 0-50ppm (Electrochemical)

    SO2 Sulfur dioxide
    6313646 Replacement sensor for CTX 300, SO2, range 0-10ppm (Electrochemical)
    6313647 Replacement sensor for CTX 300, SO2, range 0-30ppm (Electrochemical)
    6313648 Replacement sensor for CTX 300, SO2, range 0-100ppm (Electrochemical)

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