332 Division II

Pressure gauges Bourdon tube

SF6 gas density monitors are designed to monitor the density of sulphur hexafluoride (SF 6) at insulated high voltage switchgears (GIS), converters, gas-insulated transmission lines (GIL) and transformers.

SF6 gas density monitors excel with outstanding reliability. The application-specific process connec-tion is fully factory-welded to the measuring instrument. This means that a second, potentially leaky screw connection at the sealing point is not required. Made to specific customer specifications.

The integrated bimetal compensation allows for maximum accuracy and thus reliability of SF6 gas insulated switchgears.

Application

Description

TypeD 7

Nominal size100

Accuracy± 1.5 % of full scale value at 20 °C ± 2.5 % of full scale value at -20/+60 °C (compensated range)

Ranges-1/+5 bar -1/+9 bar Others on request

Application areaFull scale value

Contact typesMagnetic spring contact (MK) Electronic contact (EK) Inductive contact (IK)

Operating temperature rangeAmbient: Tmin = -40 °C Tmax = +65 °CMedium: Tmax = +100 °CCompensated: -20/+60 °C

Degree of protectionIP 65 (EN 60529) with housing vent IP 54

Technical specifications

Standard version ConnectionStainless steel 316 Ti/316 L or lower backG½B – spanner size SW 22 (EN 837-1/7.3)

Electrical connectionJunction box

Measuring elementBourdon tube, stainless steel 316 /316 L

MovementStainless steel

DialAluminium, white

PointerAluminium, black

HousingStainless steel 304 with pressure relief port

Crimped bezelStainless steel 304

WindowLaminated safety glass

Filling liquidSilicone oil

Options ■■ Without electrical contacts■■ Special scales

■■ Other process connections (e. g. DILO DN 8)■■ Housing nitrogen filled

SF6 gas density monitor

iPrices on request.

■■ Housing completely tight due to welding and crimping■■ Bimetal-compensated■■ Robust and reliable ■■ With or without electrical contacts■■ With application-specific process connection■■ DNV and Gosstandart certified

9

333Division II

Bottom connection, G½B – spanner size SW 22 Connection DILO DN8

Bottom connection, G½B – spanner size SW 22 Connection DILO -DN 8

SF6 gas density monitor Type D 7 – NG 100

Housing types and dimensions (mm)

Pressure gaugesBourdon tube

90 ±1

Ø 1

00.

5

16

M 20x1.5 2x17

22.6

Ø20

Ap

pro

x. 7

2

9