Gas Density Relays, Gas Pressure Calibrators/Gauges/Meters

Hot Products

Applications Medium and high-voltage equipment Gas density monitoring of closed SF6/or mixed gas tanks Raising an alarm when defined limit values have been reached Special Features On-site display with switch contact Temperature-compensated and hermetically sealed, therefore no influence of temperature fluctuations,differences in level and atmospheric pressure fluctuations Compensation possible for gas mixtures Functional check or recalibration possible without dismounting, in accordance with EU regulation No. 517/2014 on fluorinated greenhouse gases Hermetically sealed case from AISI 304 stainless steel, test connection is welded to prevent leakage To achieve a maximum of four switch contacts,an overpressure alarm, dual alarm or double locking and many other options make gas density monitor safer and more reliable

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FXM100/T Series Remote SF6 Gas density monitor

Applications Medium and high-voltage equipment Density monitoring of closed SF6/or mixed gas compartment Remote monitoring of the SF6/or mixed gas real-time condition Raising an alarm when defined limit values have been reached Special Features Ideally suited for smart grid or modernisation projects Modbus® delivers measured values for pressure, temperature and gas density as digital signal The 4&sim;20 mA version outputs the absolute pressure at 20℃[68 °F] or the gas density(g/l) as an analogue signal for SF6 gas Compact design with only one process connection,achieving remote control.High resistance to electromagnetic interference Suitable for alternative gases

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FXM60 Series SF6 Gas Density Monitor

Applications Medium-voltage equipment Gas density monitoring of closed SF6/or mixed gas tanks Raising an alarm when defined limit values have been reached Special Features Hermetically sealed case from stainless steel On-site display with switch contact Temperature-compensated and hermetically sealed, therefore no influence of temperature fluctuations, differences in level and atmospheric pressure fluctuation Compensation possible for gas mixtures Traceability by serial number Pressure interface customised in accordance with customer requirements. Utmost three pairs of switching contacts can be provided according to the needs of the user

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V2-T Series SF6 Gas Density Sensor

Application Permanent monitoring of the relevant gas condition parameters in closed tanks. For internal and external SF6/ or mixed insulated equipment Special features High-accuracy sensor technology Modbus® output protocol via RS-485 interface, real-time data collection Case from stainless steel,ingress protection IP65 Very good long-term stability and EMC characteristics Compact dimensions Interface size can be customized

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V3-F Series Valve Devices

Application Medium and high-voltage switchgear Special features Functional check or recalibration possible without dismounting,in accordance with EU regulation No. 517/2014 on fluorinated greenhouse gases. People can operate independently without disassembling the screws,which saves effort and time. It can facilitate on-site personnel to measure micro-water and supplement air for switch. Avoid surface scoring and joint damage from disassembly Test connection from stainless steel pipe/or copper pipe for testing other parameters

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FXV Series Self-Sealing Valve

Application Medium and high-voltage equipment Handing at SF6/or mixed gas tanks For indoor and outdoor equipment Connecting to SF6/or mixed gas charging and vacuum device Connecting to SF6/or mixed gas recovery device Special features The valves can be disconnected or coupled under pressure or vacuum Vacuum and pressure-tight (-1&sim;+64 bar) Working temperature -40&sim;+80℃ Leak rate: ≤ 1·10-8 mbar · l / s Tested helium tightness of 100 % Self sealing: If the device or connector is removed, it can be self sealing Reusable Interface size can be customized

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OVER 10 YEARS OF EXPERIENCE

The Fosense gas density measuring instruments are temperature-compensated and hermetically sealed, which provide reliable warnings against dangerously low gas levels, even under extreme ambient conditions. When used in humid or impure SF6 gas ambient conditions, SF6 gas insulated switchgear will produce decomposition products under the action of arc discharge , and these low concentration decomposition products will significantly reduce the safety of SF6 gas insulated switchgear.Therefore,raise an alarm before the gas leakages(even in case of small leakages ) or emission. Given it, we have launched a series of high-quality gas monitors and related accessories . The self-sealing valve and long-term airtight connection device can always keep SF6 gas that is harmful to the environment in the designated container without leakage.

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Latest News

2024-01-26 Passed the testing for digital remote transmission meters by CEPRI Read More

29
2023.12

Holiday Announcement of 2023 New Year
Dear customers： Thanks for your concern and care for such a long time. According to the production arrangement, our company has made a holiday plan for this coming holiday: New Year: Dec.30th - Jan.1th; Resume normal work from Jan.2nd If you have any urgent or special demand, please contact us freely, we will do our best to cooperate with you. Happy New Year! Thank you very much! Shanghai Fosense Instrumentation Co.,Ltd
06
2023.04

The Company Has Been Recognized As a High-tech Enterprise
The Shanghai FOSENSE has recently received the "High tech Enterprise Certificate" jointly issued by the Shanghai Science and Technology Commission, Shanghai Finance Bureau, State Administration of Taxation, and Shanghai Taxation Bureau. This is the second time the company has been recognized as a high-tech enterprise since 2019. The certificate was issued on December 14, 2022 and is valid for three years. The recognition of the company as a high-tech enterprise is a recognition of the company's independent research and development, technological innovation, and growth potential in SF6 density relay products. It helps to enhance the company's core competitiveness and influence, and has a positive impact on the company's future operation and development.
13
2020.11

Our Company's Newly Developed LoRa Wireless Remote Transmission Meter Product Release
FXM100/TW Series LoRa Wireless Remote SF6 Gas Density Relay Description The FXM100/TW series LoRa wireless remote SF6 gas density relay can achieve LoRa wireless remote transmission function. Full power with SF6 density relay. It can directly indicate the density (P20) value on the dial, which is used to monitor the density (P20) value of SF6 gas in closed containers. When the density (P20) value reaches the set value, the internal contact logic state changes, thereby outputting the contact signal; It also has real-time digital information collection, calculation, and LoRa wireless remote transmission,which can provide real-time data for the online monitoring system of equipment status. Mainly used for SF6 Insulated GIS switchgear, circuit breakers, pole mounted switches, and transformers, as well as SF6 gas online monitoring systems. Monitoring range -0.1~0.9MPa (customizable) Monitoring accuracy (SF6 is gas state) 20℃: ±1.0%(F.S.) or ±1.6%(F.S.） -40℃~60℃: ±2.5%（F.S.） Ingress protection IP66 Ambient temperature -40℃ 60℃, relative humidity 95%RH Leakage rate (helium leak detection) Interface size M20 1.5、 (customizable) Type of contact Magnetic assisted electric contact switch 80% Ag20% Ni contact gold plated 10μm Insulation performance Resistance of insulation>100MΩ(500V DC)、power-frequency withstand voltage≥2Kv,50/60 Hz 1min Contact electrical parameters ≤30W/50VA、≤1A、≤220VDC/380VAC Shock resistance ≤50g(Oil filled) or ≤30g(Oil free) vibration resistance 20m/s² Weight ≈1.2kg Supply voltage 24DC Power consumption ≤2W Communication LoRa wireless transmission, transmission distance over open spaces 5km Anti-electromagnetic interference IEC61000-4-2:4class(15KV) IEC61000-3:3class(10V/m) IEC61000-4-4:4class(4KV) IEC61000-45:4class(+/4KV) IEC61000-4-6:3class(10V) IEC61000-48:5class(100A/m) IEC61000-4-9:5class IEC61000-4-10:5class IEC61000-4-11:60%Ut Application The FXM100/TW series LoRa wireless remote SF6 gas density relay, combined with LoRa data transmission radio DT U, which can achieve LoRa wireless transmission between FXM100/TW and DTU.And DTU outputs externally RS485 (ModBus RTU), TCP/IP, 4G and other communication interfaces and protocols.