G-TRAN Series Multi Ionization Gauge ST2-1 / ST2-2

◙ World’s first metal type triode ionization vacuum gauge (Patent pending)
Even in harsh environment, this world’s first metal type triode ionization vacuum gauge will achieve long-life and shows the best advantage of the triode type.
◙ Strong Metal Vacuum Tube
robe is made of small metal which makes no worry of such damage as glass type.
◙ Improvement in the measurement accuracy
Improvement in the measurement accuracy of ±10% and excellent sensitivity stability has realized.
◙ Wide-range measurement
Wide pressure measuring range from atmospheric pressure to high vacuum range (10⁺⁵ to 10^-5Pa, 760 to 7.75×10^-8 Torr, 10¹³ to 10^-7mbar).(When SPU and SAU are used together)
◙ Possible to connect gauge heads with different measurement ranges
With Multi Ionization Gauge, a gauge head is selected depending on the usage
◙ Precise measurement of atmospheric pressure
Confirming atmospheric pressure easily and accurately (when SAU is used together)
◙ Indication signal of filament life time by the electron
Monitoring the electron volume can observe the life time of filament.
◙ Low environmental burden
Capable of reducing costs as only failed gauge heads are replaced
◙ Improvement in visibility
With high visible LED for error verification
◙ Maintenance
Easy sensor head replacement
◙ Applicable standard
Conforms with CE

◙ Process control in high vacuum process such as for OLED and Touch panel manufacturing system.
◙ Measurement of ultimate pressure at various industrial vacuum equipment such as vacuum furnaces.
◙ Measurement under atmosphere which include hydrocarbon (oil-based).
◙ When processing of vacuum parts, measurement under atmosphere where oil and lavage remain potentially.
◙ Measurement of vacuum equipments that wants to aim at exchange frequency reduction of sensor head.
※Please contact in case of using Corrosive gas (Halogen gas).

Model		ST2-1	ST2-2
Type name		Standard type	Serial communication type
Connectable sensors		ST2 gauge head SWT-16 (NW16): 1 SPU Pirani vacuum gauge measuring unit: 1 (option) SAU pressure sensor unit: 1 (option)
Measurable pressure range		1×10-5 to 1×10+1 Pa
Accuracy		1×10-4 to 3 Pa: ±10% 7.5×10-7 to 2.2×10-2 Torr: ±10% 1×10-6 to 3×10-2 mbar: ±10%
Repeatability		1×10-4 to 3 Pa : ±2％
Sampling time		50 ms， 5x moving average
Value output		Output voltage: 0 to 10 VDC, LOG output： 0.75 V/1 decade Pressure conversion equation: V=7.25+0.75＊ (LogP-2)  P=10^｛ (V-7.25)/0.75+2｝＊Also combined with the output voltage for setpoint adjustment (SH2-1 only)
Update time		50ms
Control input signals		FIL ON/OFF, FIL 1/2, DEGAS ON/OFF Operates with open collector input, negative logic
Control output signals		Sensor error, setpoint 1/2/3, emission valid, filament current abnormality Rating: 24VMAX, 50mAMAX, saturation voltage 1V
Serial communications			RS232C、RS-485
LED display		POWER/ERROR: Power, error LED FIL: B-A gauge filament status indicator
		SET1 to 3 Setpoint 1 to 3 LED
Emission current		2mA (1×10-2 Pa or lower), 10μA
Degas Method		Electron bombardment – Emission current 2mA, grid voltage approx. 330V
Maximum pressure of sensor		B-A: 2×10+5 Pa (absolute pressure) ＊ Take the withstand pressure for flanges, clamps, and other components into account separately．
Internal volume of sensor		SWT-16: 17cm3
Operating temperature range		10 to 50℃
Operating humidity range		15 to 80%  RH (no condensation)
Storage temperature		-20 to 65℃ (when unpowered, no condensation)
IP rating		IP30
Power supply voltage		20 to 28 VDC (ripple, noise 1% or lower) Steady state 8W, Degas 19W or lower, 6A or lower when power supply turned on (4m)
Input/output connector		D-sub15-pin 2.6mm screws
Weight		Controller: Approx． 530g, Gauge head (SWT-16) 80g
Dimension		183.8×75×62.2mm
Applicable standard		CE standards
Options	Multi Ionization Sensor head	SWT-16 (NW16)  material of gas contacting sections: Filament: Ir/Y2O3 -coated PtC-Mo, SUS304, W, Kovar glass, Kovar/Ni plating
	Pirani Vacuum Gauge	SPU
	Pirani Vacuum Sensor head	WP-16 (NW16) Material of gas contacting sections: Filament-Pt, BS/Ni plating, Ni, solder
	Pressure sensor	SAU (NW16) Material of gas contacting sections: SUS316L
	Unit cable	0.5m for SPU/0.5m for SAU
	Display unit	1CH: ISG1 (DC24V) 4CH: IM1R1 (DC24V)/IM2R1 (AC100V)
	Display cable	Cable between ST2 and display unit 2m, 5m, 10m, 15m, 20
	Input/output conector (D-sub 15-socket (M2.6mm screw))
	Inspection result data sheet, General calibration test report, JCSS caribration certificate

 

>> Mode Specifications

ST2 have three options; simple mode with a multi ionization gauge, combination mode with a multi ionization gauge and a pirani gauge (SPU), and triple combination mode with a multi ionization gauge, a pirani gauge (SPU) and a pressure switch.

Mode	ST2 Simple mode	ST2＋SPU Combination mode	ST2＋SPU＋SAU Triple combination mode
Measurable pressure range	1×10-5 ～ 1×10+1Pa	1×10-5 ～ 1×10+4Pa	1×10-5 ～ 1×10+5Pa
Accuracy	1×10-4 to 3Pa : ±10% 3 to 1×10+1Pa : ±15%7.5×10-7 to 2.2×10-2 Torr: ±10% 2.2×10-2 to 7.5×10-2 Torr: ±15%1×10-6 to 3×10-2 mbar: ±10% 3×10-2 to 0.1 mbar: ±15%	1×10-4 to 3Pa : ±10% 3 to 1×10+3Pa : ±15% 1.0×10+3 to 3.0×10+3Pa ： ±30%7.5×10-7 to 2.2 10-2 Torr: ±10% 2.2×10-2 to 7.5 Torr: ±15% 7.5 to 22.5 Torr: ±30%1×10-6 to 3×10-2 mbar: ±10% 3×10-2 to 10 mbar: ±15% 10 to 30 mbar: ±30%	1×10-4 to 3Pa : ±10% 3 to 1×10+3Pa : ±15% 1.0×10+3 to3.0×10+3Pa ： ±30% 1.0×10+4 to 1.0×10+5Pa : ±3%F.S.7.5×10-7 to 2.2 10-2 Torr: ±10% 2.2×10-2 to 7.5 Torr: ±15% 7.5 to 22.5 Torr: ±30% 75 to 760 Torr: ±3% F.S.1×10-6 to 3×10-2 mbar: ±10% 3×10-2 to 10 mbar: ±15% 10 to 30 mbar: ±30% 100 to 1013 mbar: ±3% F.S.
Repeatability	1×10-4 ～ 3Pa : ±2％