About Eldridge Products, Inc.
30 Years of Thermal Mass Flow Meter Excellence
Since 1988, Eldridge Products, Inc. (EPI) has been one of the world’s premier thermal mass flow meter manufacturers.
For 30 years, EPI™ has specialized in manufacturing accurate,
economical and reliable thermal mass flow meters and other flow related products.
Introduced the Epi-Val™ with LiveZero™ In-Situ or Field Validation Field-Val™ firmware with EPICom interface for Master-Touch™ & ValuMass™ Flow Meters; BACnet communication protocol interface soon.
Moved to new 15,000 square foot facility with greatly expanded calibration laboratory.
Installed & made operable new high flow closed-loop flow calibration system.
Engineered, purchased, & built new high flow closed-loop flow calibration system.
Received Hazardous Location IECEx certification for Master-Touch™ MP Series Flow Meters.
Introduced Profibus DP communication protocol interface for Master- Touch™ Flow Meters.
Introduced our Master-Touch™ Flow Meters with Digital Sensor Interface (DSI) sensor drive with wide temperature compensation curve fit.
Established the ValuMass™ Series 500 & 400 line of low cost Flow Meters with Digital Sensor Interface (DSI); RFI/EMI certification update of Master-Touch™ & ValuMass™ Flow Meters.
Introduced HART communication protocol interface; E-Logger™ Flow Meter internal data logging into an E-Log™ file, accessible through EPI’s proprietary EPICom™ Flow Meter communication software; Introduced RS485 Modbus RTU communication protocol interface Flow Meters now include 0-5VDC, 4-20mA, RS232, Hi & Low Relays.
Received ATEX (KEMA) certification for Master-Touch™ MP Series Flow Meters; Introduced RS485 Modbus RTU communication protocol interface, LightWire™ Infrared Flow Meter communication.
Patented the Thermal Mass Flow Meter wide temperature correction method; Received CSA/CUS certifications for Master-Touch™ MP (Hazardous Location) & MPNH (Ordinary Location), Series Flow Meters.
Patented the thermal Flow Averaging Tubes (FAT™); Introduced first all microcontroller operated Flow Sensor design; Introduced self cleaning Sensor Air Purge through Master-Touch™ Insertion Flow Meter Probes.
Field tests first hybrid analog/digital microcontroller operated Flow Sensor; Introduced self cleaning Sensor Air Purge System on Multi-Point Stack Probes.
Invented 1st hybrid analog/digital microcontroller operated Flow Sensor.
Introduced the Non-Hazardous location Master-Touch™ Series 8000MPNH & 9000MPNH Flow Meter product lines.
Introduced high pressure, screw-drive probe retractor assembly; Introduced Bi-Directional Flow Meter.
Received China Pattern Approval (CPA) for Master-Touch™ Flow Meters; Introduced EPICommunicator™ or EPICom™ communication software for Master- Touch™ Flow Meters; Introduced Master-Touch™ UHP High Purity Flow Meter.
Received Hazardous Location CENELEC (LCIE) Ex certification for the Series 8000, 7000, 6000; EPI flow laboratory installed two gas provers.
Introduced the Master-Touch™ Series of fully microprocessor-based flowmeters; receives Hazardous Location CSA certification for the Series 8000, 7000, 6000; Standard outputs include 0-5VDC, 4-20mA, RS232, Hi & Low Relays; Moved to 9000 square foot manufacturing facility; Introduced Master-Touch™ Series 8000MP & 9000MP product line; RFI/EMI certification of Master-Touch™
Developed 900°F (482 ᵒC) high temperature stack insertion Flow Meter; RFI/EMI certification of Series 8000, 7000, 6000 Flow Meters.
Established Asia and Pacific Rim Distributors.
Developed 400 ᵒF (204 ᵒC) low flow axial sensor Flow Meter; Introduced the Non-Hazardous location Series 8000NH Flow Meter, 7000NH Flow Switch , 6000NH Level Switch product lines.
Established Western European Distributors; Developed high velocity Particulate Shield PS1 Flow Meter; Introduced Ordinary Location (NH) Flow Meter product line; EPI lab installed 1000°F Air Test Stand.
Developed Iso-kinetic stack velocity & sampling probe systems; Developed dual sting metal clad sensors; Developed control valve & controller; Received FM certification for Series 8000, 7000, 6000 Flow Meters.
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