# Shandong Friend Control System Co., Ltd. | Gas Liquid compact pressure transmitter,Water Industry compact pressure transmitter,gauge pressure transmitter FD80D, pressure transmitter 4 20ma 100:1,high precision pressure transmitter 4 20ma,100:1 high precision pressure transmitter, high precision differential pressure transmitter 4 20ma,high precision water pressure transmitter 4 20ma,hart protocol water pressure transmitter 4 20ma, ## summary > Manufacturer, Exporter, Seller, Brands: FRD, Shandong Friend Control System Co., Ltd. Is a national high-tech enterprise, specializing in instrumentation R&D, manufacturing and industrial control services. FRD focuses on high-precision monocrystalline silicon pressure sensors/transmitters. Holding Class 0.05 transmitter qualification, it has 65 independent IPs (6 invention patents), CE/ATEX/SIL certifications, and lean production line (200,000 annual output). Its products serve oil & gas, chemical industry, food & pharmaceutical etc., Established in 2002, Employees: 86~96, Annual sales: 1000000-5000000, Export ratio: 20% - 30%, Primary markets: North America, South America, Southeast Asia, Middle East. ## Company Information * [Company Profile](https://www.frdsensor.com/aboutus.html): Overview, history, teams and core capabilities. * [Factory & Manufacturing](https://www.frdsensor.com/factory.html): Production capacity, OEM/ODM capabilities, and R&D strength. * [Quality Control](https://www.frdsensor.com/quality.html): ISO certifications, quality standards, and compliance. * [Contact Us](https://www.frdsensor.com/contactus.html): Global offices, inquiries, and support channels. ## Product Category * [Pressure Transmitter](https://www.frdsensor.com/supplier-4797319-pressure-transmitter): Keywords: intelligent pressure transmitter,differential pressure transmitter,compact pressure transducer. * [Level Transmitter](https://www.frdsensor.com/supplier-4797332-level-transmitter): Keywords: pressure level transmitter,water level transmitter,liquid level transmitter. * [Hygienic Pressure Transmitter](https://www.frdsensor.com/supplier-4797320-hygienic-pressure-transmitter): Keywords: hygienic pressure transducer,sanitary pressure transmitter,sanitary pressure transducer. * [Water Level Transmitter](https://www.frdsensor.com/supplier-4797330-water-level-transmitter): Keywords: liquid level transmitter,submersible level transmitter,compact pressure transmitter. * [Oil Pressure Transmitter](https://www.frdsensor.com/supplier-4797321-oil-pressure-transmitter): Keywords: pressure level transmitter,explosion proof pressure transmitter,differential pressure transmitter. * [Cleanroom Environmental Monitoring](https://www.frdsensor.com/supplier-4806028-cleanroom-environmental-monitoring): Keywords: temperature & humidity transmitter,temperature and humidity transmitter,temperature humidity transmitter. * [Pressure Transmitter Flange Type](https://www.frdsensor.com/supplier-4797323-pressure-transmitter-flange-type): Keywords: flanged pressure transmitter,pressure level transmitter,pressure transmitter flange connection. * [Pressure Sensor](https://www.frdsensor.com/supplier-4797318-pressure-sensor): Keywords: differential pressure sensor,oil pressure sensor,pressure measurement sensor. * [OEM Components](https://www.frdsensor.com/supplier-4802895-oem-components): Keywords: pressure flange,flange assembly,pressure sensor assembly. * [Pressure Gauge](https://www.frdsensor.com/supplier-4797335-pressure-gauge): Keywords: digital pressure gauge,differential pressure gauge,precision pressure gauge. * [Flow Meassurement](https://www.frdsensor.com/supplier-4797338-flow-meassurement): Keywords: vortex flowmeter,electromagnetic flowmeter,metal tube rotameter. * [Temperature Transmitter](https://www.frdsensor.com/supplier-4797368-temperature-transmitter): Keywords: bimetallic thermometer,digital temperature transmitter,temperature sensing element. ## Featured Products * [Explosion Proof Remote Flange Oil Pressure Transmitter For Petrochemical High Risk Areas](https://www.frdsensor.com/sale-54224169-explosion-proof-remote-flange-oil-pressure-transmitter-for-petrochemical-high-risk-areas.html): Keywords: remote flange oil pressure transmitter,petrochemical oil pressure transducer,petrochemical oil pressure transmitter. * [FD-10C Embedded Snap On Cover Temperature & Humidity Transmitter 316L Stainless Steel Monitor](https://www.frdsensor.com/sale-54286286-fd-10c-embedded-snap-on-cover-temperature-humidity-transmitter-316l-stainless-steel-monitor.html): Keywords: temperature & humidity transmitter 316l,embedded temperature humidity transmitter,embedded temperature & humidity transmitter. * [High Precision Industrial Level Measurement Transmitter 4mA - 20mA DC Output](https://www.frdsensor.com/sale-54224687-high-precision-industrial-level-measurement-transmitter-4ma-20ma-dc-output.html): Keywords: industrial level measurement transmitter,level measurement transmitter 4ma - 20ma,high precision industrial level transmitter. * [High Precision Pressure Transmitter 4 20mA 100:1 Turndown Ratio With HART RS485 Output](https://www.frdsensor.com/sale-54224525-high-precision-pressure-transmitter-4-20ma-100-1-turndown-ratio-with-hart-rs485-output.html): Keywords: pressure transmitter 4 20ma 100:1,high precision pressure transmitter 4 20ma,100:1 high precision pressure transmitter. * [Cleanroom Environmental Monitoring Stainless Steel Embedded Micro 4-20mA/RS485 For Medical / Fume Detection](https://www.frdsensor.com/sale-54285679-cleanroom-environmental-monitoring-stainless-steel-embedded-micro-4-20ma-rs485-for-medical-fume-dete.html): Keywords: cleanroom temperature & humidity transmitter,embedded temperature humidity transmitter,embedded temperature & humidity transmitter. * [FD80D Compact Pressure Transmitter with 0.25%F.S Accuracy and 4~20mA+HART Output for Water Industry](https://www.frdsensor.com/sale-54368301-fd80d-compact-pressure-transmitter-with-0-25-f-s-accuracy-and-4-20ma-hart-output-for-water-industry.html): Keywords: Gas Liquid compact pressure transmitter,Water Industry compact pressure transmitter,gauge pressure transmitter FD80D. * [High Precision Differential Pressure Transmitter 4 20mA With HART Protocol](https://www.frdsensor.com/sale-54202033-high-precision-differential-pressure-transmitter-4-20ma-with-hart-protocol.html): Keywords: high precision differential pressure transmitter 4 20ma,high precision water pressure transmitter 4 20ma,hart protocol water pressure transmitter 4 20ma. * [High Stable Industrial Pressure Transmitter Intelligent Explosion Proof GB3836](https://www.frdsensor.com/sale-54190656-high-stable-industrial-pressure-transmitter-intelligent-explosion-proof-gb3836.html): Keywords: industrial pressure transmitter intelligent,industrial ethernet pressure transmitter,intelligent ethernet pressure transmitter. * [Clamp Type Stainless Steel Sanitary Pressure Transmitter FD80F With Heat Sink for Food & Pharma Industry](https://www.frdsensor.com/sale-54286492-clamp-type-stainless-steel-sanitary-pressure-transmitter-fd80f-with-heat-sink-for-food-pharma-indust.html): Keywords: Clamp Type sanitary pressure transmitter,SS sanitary pressure transmitter,4-20mA ceramic diaphragm pressure transmitter. ## Case Studies & Applications * [FRD SENSOR Pressure Gauge Application Case in Chile Chemical Plant](https://www.frdsensor.com/cases/frd-sensor-pressure-gauge-application-case-in-chile-chemical-plant-80323.html) * [Industry Application Case: FRD SENSOR FD80B Smart Universal Pressure Transmitter](https://www.frdsensor.com/cases/industry-application-case-frd-sensor-fd80b-smart-universal-pressure-transmitter-59736.html) * [High Precision & Full Protection: Advantages of FRD Sensor 3051SDP Differential Pressure Transmitter](https://www.frdsensor.com/cases/high-precision-58169.html) * [FRD Explosion-proof Pressure Transmitter for Oil & Natural Gas Industry](https://www.frdsensor.com/cases/frd-explosion-proof-pressure-transmitter-for-oil-57616.html) * [Water Treatment Industry | On-site Application of 3051ST High Precision Pressure Transmitter](https://www.frdsensor.com/cases/water-treatment-industry-on-site-application-of-3051st-high-precision-pressure-transmitter-56951.html) * [Monocrystalline Silicon Differential Pressure Transmitters for Oil & Gas Applications](https://www.frdsensor.com/cases/monocrystalline-silicon-differential-pressure-transmitters-for-oil-48692.html) ## Search Search endpoint: https://www.frdsensor.com/buy-{keyword}.html Rules: - Convert keywords to lowercase - Replace spaces with "-" - Remove special characters Users can combine keywords for more precise searches. ## News & Blog * [Records of the End of 2024](https://www.frdsensor.com/news/records-of-the-end-of-2024-269977.html) * [Case Study: FD820C Embedded Micro Differential Pressure Transmitter in Pharmaceutical Cleanroom Applications](https://www.frdsensor.com/news/case-study-fd820c-embedded-micro-differential-pressure-transmitter-in-pharmaceutical-cleanroom-appli-269995.html) * [FRD Shines at SMAGUA 2025 in Zaragoza , Driving Innovation in Sustainable Solutions](https://www.frdsensor.com/news/frd-shines-at-smagua-2025-in-zaragoza-driving-innovation-in-sustainable-solutions-284354.html) * [49th Indonesia International Oil and Gas IPA Exhibition 2025](https://www.frdsensor.com/news/49th-indonesia-international-oil-and-gas-ipa-exhibition-2025-284358.html) * [FRD GM Inducted into CEMA’s Equipment Expert Database](https://www.frdsensor.com/news/frd-gm-inducted-into-cema-s-equipment-expert-database-264572.html) * [FRD Sensor | Precision Measurement & Control, Empowering Industry](https://www.frdsensor.com/blog/frd-sensor-precision-measurement-312144.html) * [Fred Sensor | Core Advantages of Pressure Transmitter Export](https://www.frdsensor.com/blog/fred-sensor-core-advantages-of-pressure-transmitter-export-306811.html) * [FRD SENSOR Pressure Transmitters: Reliable Precision for Global Industrial Applications](https://www.frdsensor.com/blog/frd-sensor-pressure-transmitters-reliable-precision-for-global-industrial-applications-316155.html) * [FRD | United as One, Win Together](https://www.frdsensor.com/blog/frd-united-as-one-win-together-319937.html) * [FRD SENSOR Shandong Friend | Top Chinese Manufacturer of High Precision Pressure & Temperature Transmitters](https://www.frdsensor.com/blog/frd-sensor-shandong-friend-top-chinese-manufacturer-of-high-precision-pressure-366127.html)