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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.

History

2017
October 16

2017

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.
2014
October 16

2014

Moved to new 15,000 square foot facility with greatly expanded calibration laboratory.
2013
October 16

2013

Installed & made operable new high flow closed-loop flow calibration system.
2012
October 16

2012

Engineered, purchased, & built new high flow closed-loop flow calibration system.
2011
October 16

2011

Received Hazardous Location IECEx certification for Master-Touch™ MP Series Flow Meters.
2009
October 16

2009

Introduced Profibus DP communication protocol interface for Master- Touch™ Flow Meters.
2008
October 16

2008

Introduced our Master-Touch™ Flow Meters with Digital Sensor Interface (DSI) sensor drive with wide temperature compensation curve fit.
2007
October 16

2007

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.
2006
October 16

2006

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.
2005
October 16

2005

Received ATEX (KEMA) certification for Master-Touch™ MP Series Flow Meters; Introduced RS485 Modbus RTU communication protocol interface, LightWire™ Infrared Flow Meter communication.
2004
October 16

2004

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.
2003
October 16

2003

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.
2002
October 16

2002

Field tests first hybrid analog/digital microcontroller operated Flow Sensor; Introduced self cleaning Sensor Air Purge System on Multi-Point Stack Probes.
2001
October 16

2001

Invented 1st hybrid analog/digital microcontroller operated Flow Sensor.
2000
October 16

2000

Introduced the Non-Hazardous location Master-Touch™ Series 8000MPNH & 9000MPNH Flow Meter product lines.
1999
October 16

1999

Introduced high pressure, screw-drive probe retractor assembly; Introduced Bi-Directional Flow Meter.
1998
October 16

1998

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.
1997
October 16

1997

Received Hazardous Location CENELEC (LCIE) Ex certification for the Series 8000, 7000, 6000; EPI flow laboratory installed two gas provers.
1996
October 16

1996

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™
1995
October 16

1995

Developed 900°F (482 ᵒC) high temperature stack insertion Flow Meter; RFI/EMI certification of Series 8000, 7000, 6000 Flow Meters.
1994
October 16

1994

Established Asia and Pacific Rim Distributors.
1993
October 16

1993

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.
1992
October 16

1992

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.
1991
October 16

1991

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.
1990
January 16

1990

1990
Introduces the Series 9000 Multipoint averaging stack probes; Established an in-house flow calibration lab.
1989
January 16

1989

1989
Introduced the Series 7000 Thermal Mass Flow Switch and Series 6000 Thermal Level Switch.
1988
January 16

1988

1988
Eldridge Products, Inc. founded by Mark Eldridge and became a thermal mass flow meter manufacturer, introducing the hazardous area class of Series 8000 Inline and Insertion Thermal Mass Flow Meters; introduces low pressure ball valve retractor assemblies.

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