ELSO Technologies Sdn Bhd
8E, First Floor,
Jalan Tun Dr. Awang,
Bukit Jambul,
11900 Bayan Lepas,
Penang, Malaysia.

Mr Loo (General Manager)
+6016-713 5255

Johor Branch
Lake View Apartment,
Jalan Austin Perdana 1,
Taman Austin Perdana,
81100 Johor Bahru,
Johor, Malaysia.

Chong CW (Sales Manager)
(WhatsApp or whatsapp call only) Oversea trip from
2/12 – 11/12/2019


Selangor Branch
Puchong, Selangor.

Glenys Teoh (Sales Manager)

East Malaysia Branch
Lot 35, Lot 5277,
Lorong 9C1, Jalan Kapor,
93150 Kuching,
Sarawak, Malaysia.

Clement Lau (Sales Engineer)

ELSO Technologies Pte Ltd
Singapore Branch

1 Coleman Street
#10-06 The Adelphi
179803 Singapore.

Chew Peng Seng  (Sales Manager)
+65 9663 8176

FRG-730 Pirani Bayard-Alpert Gauge

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FRG-730 Pirani Bayard-Alpert Gauge Vacuum Measurement Agilent Technologies

The FRG-720 and FRG-730 combine Agilent's Pirani and Bayard-Alpert sensor into a single compact design that provides measuring capability from 5 x 10-10 mbar to atmosphere (3.8 x 10-10 Torr to atmosphere). Combining these two technologies into a single unit reduces complexity and integration challenges while protecting the Bayard-Alpert sensor from premature burnout.

  • Combination gauge Bayard-Alpert and Pirani provides wide measurement range from 5 x 10-10 mbar to atmosphere
  • Pirani interlock – protects Bayard-Alpert sensor from premature burnout and contamination effects from high pressure operation
  • Long-life ytterium oxide-coated iridium filament brings a rugged design for a wide-range of applications
  • Set point control
  • LCD display option allows monitoring of pressure readings easily
  • Profibus communication option facilitates simplified network integration

Technical Specifications


Measurement range (Air, O2, CO, N2) 5 x 10-10 to 1000 mbar (3.8 x 10-10 to 760 Torr)
Accuracy 10-8 to 10-2 mbar/torr – ± 15% of reading
Repeatability 10-8 to 10-2 mbar/torr – ± 5% of reading
Degas p < 7.2 x 10-6 mbar – electron bombardment, max. 3 min
Pressure, maximum

2 bar absolute

Temperature Operation
Storage Bakeout at flange w/extension Bakeout at flange wo/extension Bakeout w/electroncs removed
0 to 50 °C –20 to +70 °C 150 °C 80 °C 150 °C
Supply voltage 20 to 28 VDC, 1.4 A on startup for 200 msec, 0.8 A operating
Output signal analog
Measurement range
Voltage vs. pressure
Error signal
Minimum loaded impedance
0 to 10 V
0.774 to 10.0 V
0.75 V/decade
0.3/0.5 V
10 kΩ
Communication interface RS-232C
Electrical connection D-sub, 15 pin, male
Maximum cable length 100 m (330 ft)
Materials exposed to vacuum Yt2O3, Ir, Pt, Mo, Cu, W, NiFe, NiCr, stainless steel, glass
Internal volume KF/CF 24 cm3 (1.46 in3) /34 cm3 (2.1 in3)
Weight KF/CF 285g/550g
Protection type IP30
Setpoint relays (1) for FRG-730 Range Relay contact Hysteresis Contact rating
1 x 10-9 to 100 mbar n.o., potential free 10% of reading 30 V/0.5 A DC
Profibus Option
Baud rates 9.6/19.2/93.75/187.5/500 kBaud; 1.5/12 mBaud
Address 2 switches (address 00 – 127) or network programmable
Digital functions Read pressure, select units (Torr, mbar, Pa); degas function, Pirani full scale adjust; monitor gauge status; safe state allows definition of behavior in case of error; detailed alarm and warning information
Analog functions 0 to 10 V analog output pressure indication; two setpoint relays A + B
Setpoint relays (2) Range Relay contact Hysteresis Contact rating
1 x 10-9 to 100 mbar n.o., potential free 10 % of reading 60 V/0.5 A DC
Connector for Profibus DP D-sub, 9 pin, female


Outline Drawing

FRG-720 / FRG-730 Pirani Bayard-Alpert Gauge Outline Drawing


Description KF25 CF35
FRG-720 Pirani/Bayard Alpert combination gauge single filament FRG720KF25 FRG720CF35
with display FRG720KF25D FRG720CF35D
with setpoints and Profibus FRG720KF25SP FRG720CF35SP
FRG-730 Pirani/Bayard Alpert combination gauge dual filaments w/set pts FRG730KF25S FRG730CF35S
FRG-730 Pirani/Bayard Alpert combination gauge dual filaments w/set pts. and display FRG730KF25SD FRG730CF35SD
FRG-730 Pirani/Bayard Alpert combination gauge dual filaments w/set pts and Profibus FRG730KF25SP FRG730CF35SP
FRG-720 Replacement sensor KF25 FRG720KF25RS
FRG-720 Replacement sensor CF35 FRG720CF35RS
FRG-730 (dual filaments) KF25 Replacement sensor FRG730KF25RS
FRG-730 (dual filaments) CF35 Replacement sensor FRG730CF35RS
FRG-720/730 Baffle FRG720BFL
FRG-720/730 Power Supply 24V DC/RS232C FRG720PWR
FRG-720/730 Bakeout extension, 100mm FRG720BKE

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