For Vacuum Deposition, Closed Furnaces, and Gloveboxes


SD_LD-450 photo



  • Setup layout is flexible.
    The separated structure of oxygen sensor and thin converter greatly relaxed the limit of installation location.
  • Space saving
    New developed thin wall mounting type converter resolved the concerns about depth.
  • Super high speed response
    The shortest response can be achieved by separated sensor.
  • High durable sensor
    The sensor with special coating realized high durability.
  • Compliant standard
    Compliant with CE marking, EN61010-1, EN61326-1, and RoHS
  • Sensors are compatible with vacuum NW flanges (16, 25, 40) and screw-in units (3/8R).

SD_LD-450 specifications

SD_LD-450 specifications


Measurement principle Battery-powered zirconia oxygen analyzer
Type Separate-type (converter: wall-mounted; sensor: direct insertion type)
Display system 4-digit digital display (concentration display)
Measurement range 0-1 / 10 / 100 / 1000ppm / 1 / 10 / 100vol% O2; 10-20 to 10-0atm
Automatic/fixed range
Repeatability Within ±0.5% of full scale; range of 0-1% or more
Within ±1% of full scale or ±1ppm, whichever is larger; range of less than 0 to -1%
Concentrations in the range of 0-1ppm are not under the warranty range
Sample gas requirements
Pressure: 10-3 - 200 KPa (absolute pressure)
Flow rate: 0.5-5,000mL/min or 0mL/min (measurement in state of natural dispersion)
Humidity: Dew point below ambient temperature
Temperature: 0-100ºC
Others: Not to contain corrosive gas (fluorine gas, chlorine gas, sulfuric gas, etc.), gas containing organic silicone, flammable ingredients (including gas), oil or moisture
Reference gas Atmospheric air
Recorder output Oxygen level output: 4-20m (choice between this and transmission output)
Insulated, and load resistance of 550Ω or less
Recorder output range taken as full scale, and oxygen concentration given in linear output
Output range: 0-100% / 0-1000ppm / 0-100ppm / 0-10ppm
Automatic/fixed range
Transmission output RS-232C (choice between this and analog output)
Alarm output FAIL (device error): 1 point
Non-voltage contact; contact capacity: 30VDC/AC or less, 0.5A or less
Contact point closes with device error (contact point operation adjustable)
ALM (concentration alarm): 4 points (HH/H/L/LL)
Non-voltage contact; contact capacity: 30VDC/AC or less, 0.5A or less
Contact point closes with alarm (contact point operation adjustable)
RDY (warmup signal): 1 point
Non-voltage contact; contact capacity: 30VDC/AC or less, 0.5A or less
* Minimum open/close capacity of the non-voltage contact point is 12V or higher; unable to respond to tiny loads
MRK (range marker) output: 2 points
Non-voltage contact; contact capacity: 30VDC/AC or less, 0.3A or less
Warmup time Under 6 min.
Dimensions Converter: 185(W)×155(H)×40(D)mm (excludes protruding parts)
Sensor unit
SD3/8R: Overall length 100mm (sensor Φ 11×37, body Φ 40×48.5)
SD16NW: Overall length 100mm (sensor Φ 11×39, body Φ 40×51)
SD25NW: Overall length 100mm (sensor Φ 11×42, body Φ 40×48)
SD40NW: Overall length 100mm (sensor Φ 11×41, body Φ 40×49)
Weight Converter: Approx. 1.2 kg; Sensor unit: Approx. 0.5 kg
External connection Vacuum flange (NW16, 25 or 40) or R3/8 screw
Power 24VDC±10%, 60VA (normal: 15VA or less)


  • Tokyo office: +81-3-3241-8461

    Shiga office: +81-77-544-6224

Technological Field
Technology >> Measurement & analysis > Oxygen Analyzers
Industry Sector
Industry sector >> Pharmaceutical & food products > Sensors for pharmaceutical and food products
Industry sector >> Fibers & films > Fiber and Film Sensors
Industry sector >> Fine chemicals > Fine Chemical Sensors
Industry sector >> Semiconductors > Semiconductor Sensors
Industry sector >> FPD > FPD Sensors
Industry sector >> Home appliances & electronics equipment > Home Appliances & Electronic Equipment Sensors
Industry sector >> Aircraft & automobiles > Aircraft & Automobile Sensors
Industry sector >> Clean energy > Clean Energy Sensors