SIS Catalog Online

F13

Thermocouple Vacuum Gauge

Scientific Instrument Services, Inc.

™

FAX: 908-806-6631

www.sisweb.com/catalog/08/F13

The Varian Thermocouple Vacuum Gauge Tube Model 531

Filament Current

165 mA (gives 14 mV across the thermocouple at pressures below 10

-3

Torr)

Response Time

3 sec. (10

-3

to 1.0 Torr)

Range

1 x 10

-3

to 2 Torr

Output

0 to14mV

Heater Resistance

1.4 ohms (approx.)

Dimensions

1.21" O.D. x 3" long

Connections

May be soldered into a system, used with1/2" '0' ring compression seal or

threaded on 1/8" IPS female thread.

Cable Connection

Octal Base (std.)

Casing

Nickel-plated mild steel

Pins

Nickel-iron alloy (Ni 48%, Fe 52%)

Volume / Weight

12 cc / 2 oz.

1.21
(30.7)
DIA.

Dimensions

Inches

Millimeters

Hex.

.56

(14.2)

A.F.

0.5

(12.7)

0.4

(10.2)

.50

(12.7)

Dia.

.41

(10.4)

Dia.

.12

(3.05)

IPS

3.03

(77)

0.5

(12.7)

General Description

The

Model

531

Thermocouple

Vacuum Gauge provides continuous and
accurate indication of total pressure from 1
x 10

-3

to 2 Torr absolute. Developed to

combine rugged dependability and
outstanding performance, the 531 offers
fast response and low power drain.

The 800 Series Thermocouple Vacuum Gauge Controls are used for repeatable,

stable pressure measurement in the 10

-3

Torr to 2 Torr range. These controls are

fully temperature compensated by use of a thermistor placed in the gauge cable
socket. The thermal response of the thermistor is equal to, but in the opposite
direction from the thermocouple characteristics, thereby compensating for
ambient temperature changes.

The 801 Part #801--Click to order
Current Price: $275.00
Unit of Measure: EA
Est. Ship Weight=4 lbs
Quantity in Stock=4
Control is compact and lightweight, with three mounting studs to

facilitate panel mounting in a minimum of space. The 802A Part #802A--Click to order
Current Price: $335.00
Unit of Measure: EA
Est. Ship Weight=4 lbs
Quantity in Stock=1
is mounted in a
portable enclosure. The 801 Part #801--Click to order
Current Price: $275.00
Unit of Measure: EA
Est. Ship Weight=4 lbs
Quantity in Stock=4
and 802A Part #802A--Click to order
Current Price: $335.00
Unit of Measure: EA
Est. Ship Weight=4 lbs
Quantity in Stock=1
have easy-to-read meter scales,
recorder output, and include a 10 ft. gauge cable and one 531 thermocou-
ple gauge tube. It also includes a 6-ft. power cord. All necessary cables are
included. The 302 Part #302--Click to order
Current Price: $300.00
Unit of Measure: EA
Est. Ship Weight=4 lbs
Not in stock. Standard lead time for out-of-stock items is approximately two weeks.
models are the same except they have a digital read-
out. Also available in 220V.

The Varian 800 Series Thermocouple
Vacuum Gauge Controls

Specifications

802A Part #802A--Click to order
Current Price: $335.00
Unit of Measure: EA
Est. Ship Weight=4 lbs
Quantity in Stock=1

Principles of Operation

T

hermocouple gauges measure pressure in terms of the amount of
heat that gas will conduct away from a hot wire. The sensing
element is a combination heater and thermocouple. Cross-shaped,

it is formed by joining two short resistance wires of different compositions, a
method of construction which gives excellent shock resistance and yet
provides the minimum mass required for fast response. With a fixed heater
power, the temperature of the junction, which depends on the conductivity of
the gas, is indicated by the voltage output of the thermocouple. As the
pressure drops, the thermocouple gets hotter and its output increases.
Readout is accomplished on a millivolt meter calibrated to indicate pressure.

801 Part #801--Click to order
Current Price: $275.00
Unit of Measure: EA
Est. Ship Weight=4 lbs
Quantity in Stock=4

302A Part #302A--Click to order
Current Price: $375.00
Unit of Measure: EA
Est. Ship Weight=4 lbs
Not in stock. Standard lead time for out-of-stock items is approximately two weeks.

Part No.

Description

F0472-301 Part #F0472301--Click to order
Current Price: $79.00
Unit of Measure: EA
Est. Ship Weight=0.25 lbs
Quantity in Stock=7

Varian 531 Vacuum Gauge Tube

Part No. *

Description

801 Part #801--Click to order
Current Price: $275.00
Unit of Measure: EA
Est. Ship Weight=4 lbs
Quantity in Stock=4

Panel Mount Vacuum Gauge Control, ANALOG

802A Part #802A--Click to order
Current Price: $335.00
Unit of Measure: EA
Est. Ship Weight=4 lbs
Quantity in Stock=1

Vacuum Gauge Controller, Mounted, ANALOG

302 Part #302--Click to order
Current Price: $300.00
Unit of Measure: EA
Est. Ship Weight=4 lbs
Not in stock. Standard lead time for out-of-stock items is approximately two weeks.

Panel Mount Vacuum; Gauge Control, DIGITAL

302A Part #302A--Click to order
Current Price: $375.00
Unit of Measure: EA
Est. Ship Weight=4 lbs
Not in stock. Standard lead time for out-of-stock items is approximately two weeks.

Vacuum Gauge Controller, Mounted, DIGITAL

* For 220V Controls add “220” to each part number (i.e. - xxx-220)

Related information may be found on the following pages of our web site:

Page	Parts
Varian 800 Thermocouple vacuum gauge control, pg F9	801, 802A
Varian thermocouple vacuum gauge tube Model 531-pg F9	F0472301
Thermocouple Gauge Tube for Finnigan Vacuum Pumps	F0472301

back to top

Send comments on this page

SIS Newsletter

Covers SIS products, services, promotions, news, and other mass spectrometer related information.

26 April 2013: SIS Aprill Newsletter; Micromass/waters , ESI Probe Capillary & Perlast® O-rings [NEW]
06 March 2013: SIS coming to Pittcon 2013; The Bullet blender and the Digivac digital vacuum gauge [NEW]
15 May 2012: Long-life MS Filaments with Yttria coated SISAlloy® (Yttria/Rhenium Alloy) Wire. [NEW]

Yttria coated filament at start
Yttria coated filament after 16,000 cycles
23 April 2012: Rotary vane vacuum pumps and two-stage vacuum filter.
3 April 2012: HPLC: Imtakt columns and NewEra syringe pump
January 2012: New Pumps Added to the List of LOW COST S.I.S. Rotary Vane Vacuum Pumps - Save 35 - 50% off the price of comparable vacuum pumps.
Nov 2011: Telatemp Measurement and Recording Devices The Industry's Most Advanced Temperature Measurement & Recording Products
Oct 2011: Reducing MS Filament Warping (Article/ASMS2011)- A study on reduction of MS filament warping by use of various filament shapes and Yttria/Rhenium alloy. (SIS Application Note #96)
June 2011: Adixen (Alcatel) ACP Series Compact Dry Roughing Pumps - a frictionless pumping module, optimized for operation without internal lubricant.
June 2011: NEW Products from SGE - SilFlow™ 3 Port/4Port Splitters,ConnecTite Inlet Liners, and EC and HT Septa
June 2011: NEW - SISAlloy® (Yttria/Rhenium Alloy) MS Filaments - Mass Spectrometer filaments that reduce or eliminate sagging.
April 2011: NIST 11 Mass Spectral Library (2011 version) - Update includes 242,893 fully evaluated EI mass spectra, GC data, rapidly growing MS/MS spectra (~9,934 ion trap & ~91,557 qtof/tandem-quad collision cell spectra), and enhanced software. Pre-orders taken today.
March 2011: NEW - Handheld Digital Microscope View and capture images or video at 10x/150x power on a PC computer via attached USB cable.
March 2011: OHAUS Moisture Analyzers
Jan 2011:Next-Advance Lab Products - affordable molecular biology instruments that automate mundane tasks, freeing scientists for repetitive, time consuming procedures.
Dec 2010:NEW Filament - Direct Replacement for the Shimadzu QP5000 Filament.
Sept 2010PCI Analytics Products - product solutions for all Analytical Instrumentation
Aug 2010: GC/LC/MS courses in 2010
Jul 2010: SilTite™ FingerTite, the next generation GC capillary ferrule system without the use of any tools. (25% discount until Oct 31)
Jun 2010: Direct Replacement for the Heated Capillary in the Thermo-Fisher Scientific TSQ & LCQ Mass Spectrometers now available
Apr 2010: Triode & Mini Bayard-Alpert Hot Ionization Gauges - Ideal for use in analytical instrumentation
Feb 2010: SGE eVol®Hand-held Automated Analytical Syringe - Will improve your laboratory workflow and reporting confidence in many ways
Feb 2010: DigiVac Bench Top Vacuum Gauges - Vacuum instrumentation with everything you need to go to work
Nov 2009: Adam Analytical Balances and Moisture Analyzers.
Nov 2009: Imtakt HPLC Columns -offer a wide variety of unique stationary phases in their HPLC columns
Oct 2009: Advanced Oil-less Rocking Piston Pumps - oil-free, lightweight, low noise
Sep 2009: Programmable syringe pumps for controlled flow. Model NE-300 priced at only $275.00
Sep 2009: NEW: Wiley 9th Edition - 660,000-850,000 spectra (a 65% increase).
Also new: Mass Spectra of Designer Drugs 2009 and Pesticides 2009
Aug 2009: NEW: Agilent 5973/75 Replacement Source Heater and Temperature Sensor
Aug 2009: NEW: SIS™ Direct Replacement Filament for the Amatek/Dycor RGA Leak Detectors and Quadrupoles (p/n 95381VE), which tests have shown increase service life.
Jun 2009: NEW: SIS™ Replacement Filter Elements For Edwards Oil Mist Eliminators - Save up to 25% off the price of comparable Edwards replacement elements.
Jun 2009: NEW: LOW COST S.I.S. Rotary Vane Vacuum Pumps - Save 35 - 50% off the price of comparable vacuum pumps.
Mar 2009: Mass Spec Source Newsletter - Spring 2009.
Mar 2009: New laboratory supply product line
Jun 2009: NIST 08
Identify mass spectra via library search with the fully-evaluated, most widely used mass spectral reference library, compiled by the National Institute of Standards and Technology (NIST).
, NIST GC
Database of 44,008 compounds common in GC analysis, each with name, synonyms, chemical formal, chemical structure diagram, ID/CAS number, and GC retention index data.
, Wiley - MS databases
Feb 2009: Handheld Digital Microscope
View and capture images or video at 20x/400x power on a PC computer via attached USB cable.
Sep 2007: 2008-2009 SIS Scientific Supply Catalog

Name:		Organization/Country:
Email:		Phone/fax: