DF-350C Thiết bị kiểm soát lưu lượng  Kofloc Vietnam ANSdanang


Sensor type Thermal sensor
Valve type Normally closed proportional solenoid valve
Applicable gases*1 N2, Air, H2, He, Ar, O2, CO2, etc.
(Gases not specifically mentioned here are subject to calibration for N2 equivalent.)
Flow range*2 10 SCCM to 10 SLM 20 to 50 SLM
(20 to 30 SLM for CO2)
Control range 2 to 100% (F.S.)
Response*3 Total flow rate control range ≤ 1 sec (within ±2% F.S.)
Accuracy*4 ±1.0% F.S.
Repeatability ±0.25%F.S.
Operating differential pressure*5 50 to 300 kPa (100 to 300 kPa for Ar and CO2) 100 to 300 kPa (150 to 300 kPa for Ar and CO2)
Inlet maximum pressure 500kPa(G)
Proof pressure 980kPa(G)
External leak rate ≤1.0 x 10-8 Pa·m3/sec (He)
Temperature Working temp. 5 to 50℃
Accuracy guaranteed temp. 15 to 35℃
Allowable storage temp. -10 to 60℃
Allowable operating humidity 10 to 90% RH (without dew condensation)
Materials of gas contact part SUS316, SUS316L, magnetic stainless steel, Ni, PTFE, PCTFE, and FKM
Electrical connection D-sub 15-pin male, high density, HR-10A (two)
Flow rate setting signal 0 to 5 V DC (input impedance: approx. 1 MΩ), or 4 to 20 mA (input impedance: approx. 250 Ω)
Flow rate output signal 0 to 5 V DC (load resistance 10 kΩ), or 4 to 20 mA (load resistance ≤ 500 Ω)
Digital communication Address setting with RS485 rotary switch or indicator: up to 99 devices (9600 bps)
Event input Three contact inputs (non-insulated)
Event output Three NPN open collectors (non-insulated, max. rating 35 V, 50 mA)
Required power supply (DC) +24 V DC (±10%), 300 mA max. (DC jack, D-sub)
Joint*6 1/4 F900 (standard), 1/4 UJR, Rc 1/4
Mounting posture Horizontal installation recommended.
Weight*7 Approx. 950 g Approx. 1100 g
*1 The gases must be dry and clean, free of corrosive components and foreign matter such as dust and mist.
*2 The flow rate calibration units SCCM and SLM indicate a mass flow rate converted to a volume flow rate in cc/min and L/min at 0°C and 1 atm.
*3 Guarantee for calibration gas: N2.
*4 Accuracy for calibration gas: N2, flow range (max. full scale).
*5 The operating differential pressure may differ depending on specifications.
*6 Contact us for any other joints.
*7 Exclusive of weight of joint.