Instruction manual
SM425 INSTRUCTION MANUAL    2.0 SPECIFICATIONS 
2.7.2 Dust Guard Protector (Part No.: K9471UC) 
Recommended when process gas flows directly into the measurement cell, flammable particulate flows 
into the measurement cell, or water droplets may leak into the measurement cell during downtime. 
Material: SUS316 
Weight: Approx. 0.3 kg 
Figure 2-11 Dust guard protector dimensions 
2.7.3 Auxiliary Ejector for High Temperature (Part No. E7046EC or E7046EN) 
This ejector is used where pressure of measured gas for high temperature detector is negative. This 
ejector consists of an ejector assembly, a pressure gauge and a needle valve. 
Standard Specifications 
Ejector Assembly 
Ejector Inlet Air Pressure: 29 to 68 kPa G 
Air Consumption: Approx. 30 to 40 l/min 
Suction gas flow rate: 3 to 7 l/min 
Connection to high-temperature probe adapter: R 1/2 
Connection: Rc1/4 or 1/4 FNPT, SUS304 (JIS) 
Tube Connection: (Ø6/Ø4 mm or 1/4 inch copper tube or stainless tube) 
Pressure Gauge Assembly 
Type: JIS B7505, A1.5U3/8 x75 
Material in Contact with Gas: SUS316 (JIS) 
Case Material: Aluminum alloy (Paint color; black) 
Scale: 0 to 100 kPa G 
Bushing (G3/8 x Rc1/4 or 1/4NPT, SUS304 (JIS)) 
Needle Valve 
Connection: Rc1/4 or 1/4FNPT 
Material: SUS316 (JIS) 
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