Accept Credit Cards


  Complete Line of Instrumentation: Pressure Calibration Hand Pumps, Pressure Gauges, Transmitters, Differential Level Switch, Sensors, Transducers, Temperature, Transmitters, Switches, Level, Flow ,Humidity, Process Controls, Laboratory Equipment
Buy Industrial and Manufacturing Instrumentation



Dewey Air Switch is used primarily to detect a loss of vacuum in stacks and flues. Usually, when the vacuum fails, this indicates a loss of flame, detects this, and can be used to turn off the fuel supply. This prevents explosions which come from un-ign Magnum Pro Magnum Pro MVP-600 Combo Pressure/Vacuum Hand Pump pneumatic scissor pump.Combo compared to Martel, Fluke Transcat
Magnum Pro Hydraulic Calibration Hand Pump 0 to 10K PSI (in stock) 2 year warranty; compared to Meriam MH-10, Martel MECP10K,Transcat Order#: 96011PR, Fluke only 1 year warranty Winchester Engineering Winchester Auto Ranging Digital Test Gauge Model M-1 will replace up to seven competing gauges. Magnum Pro MP-P Calibration Hand Pump, 0 to 100 psi 2 year compare Martel MECP100, Transcat , Ralston 1 year warranty





Mercoid 3100D Explosion-proof Differential Pressure Transmitter
HART® Communication, Push Button Configuration, Rangeability (100:1) compared to Rosemount 30151CD Mercoid 3100D Explosion-proof Differential Pressure Transmitter
HART® Communication, Push Button Configuration, Rangeability (100:1) compared to Rosemount 30151CD Magnum Pro Hydraulic  Calibration Hand Pump 0 to 10K PSI (in stock) 2 year warranty; compared to Meriam MH-10, Martel MECP10K,Transcat Order#: 96011PR, Fluke only 1 year warranty Mercoid 3100D Explosion-proof Differential Pressure Transmitter
HART® Communication, Push Button Configuration, Rangeability (100:1) compared to Rosemount 30151CD
Mercoid® Series 3100 Smart Pressure Transmitter is a microprocessor-based
high performance transmitter, which has flexible pressure calibration, push button
configuration, and programmable using HART® Communication. The Series 3100 is capable
of being configured for differential pressure or level applications with the zero and span
buttons. A field calibrator is not required for configuration. The transmitter software
compensates for thermal effects, improving performance. EEPROM stores configuration
settings and stores sensor correction coefficients in the event of shutdowns or power loss.
The Series 3100 is FM and ATEX approved for use in hazardous (classified) locations. The
100:1 rangeability allows the smart transmitter to be configured to fit any application.
Mercoid® Series 3100 Smart Pressure Transmitter is a microprocessor-based
high performance transmitter, which has flexible pressure calibration, push button
configuration, and programmable using HART® Communication. The Series 3100 is capable
of being configured for differential pressure or level applications with the zero and span
buttons. A field calibrator is not required for configuration. The transmitter software
compensates for thermal effects, improving performance. EEPROM stores configuration
settings and stores sensor correction coefficients in the event of shutdowns or power loss.
The Series 3100 is FM and ATEX approved for use in hazardous (classified) locations. The
100:1 rangeability allows the smart transmitter to be configured to fit any application.
Magnum Pro Hydraulic Calibration Hand Pump 0 to 10K PSI in stock and 2 year warranty compared to Martel MECP10K,Transcat, Fluke with 1 year; the Magnum Pro comes with free tune up should you need to send in within 2 year and there is no charge! Mercoid® Series 3100 Smart Pressure Transmitter is a microprocessor-based
high performance transmitter, which has flexible pressure calibration, push button
configuration, and programmable using HART® Communication. The Series 3100 is capable
of being configured for differential pressure or level applications with the zero and span
buttons. A field calibrator is not required for configuration. The transmitter software
compensates for thermal effects, improving performance. EEPROM stores configuration
settings and stores sensor correction coefficients in the event of shutdowns or power loss.
The Series 3100 is FM and ATEX approved for use in hazardous (classified) locations. The
100:1 rangeability allows the smart transmitter to be configured to fit any application.
Magnum Pro Low Volume Pressure Chamber M-80, vacuum to low pressure Ralston Instruments QTFT-2MB0 
1/4" male NPT x male Quick-test, no check-valve, with cap and chain , brass Mercoid 3100D Explosion-proof Differential Pressure Transmitter
HART® Communication, Push Button Configuration, Rangeability (100:1) compared to Rosemount 30151CD Mercoid 3100D Explosion-proof Differential Pressure Transmitter
HART® Communication, Push Button Configuration, Rangeability (100:1) compared to Rosemount 30151CD
Ralston QTFT-2mbo
Our Price: $18.10
Magnum Low Pro Volume Pressure Chamber M-80.  Extremely high resolution (0.005 psi)  absolute vacuum to low pressures (30" Hg to 80 psi)

It's rugged outer housing and dual o-ring design ensures zero leakage. The M-80 is bench mountable, though it's relatively light weight (3.5 lbs) allows for it to be carried out into the field for use as well. Positively the best connection you could have!

QTFT-2MB0 Ralston Instruments Quick Test Connect fitting


1/4" male NPT x male Quick-test, no check-valve, with cap and chain , brass

Mercoid® Series 3100 Smart Pressure Transmitter is a microprocessor-based
high performance transmitter, which has flexible pressure calibration, push button
configuration, and programmable using HART® Communication. The Series 3100 is capable
of being configured for differential pressure or level applications with the zero and span
buttons. A field calibrator is not required for configuration. The transmitter software
compensates for thermal effects, improving performance. EEPROM stores configuration
settings and stores sensor correction coefficients in the event of shutdowns or power loss.
The Series 3100 is FM and ATEX approved for use in hazardous (classified) locations. The
100:1 rangeability allows the smart transmitter to be configured to fit any application.
Mercoid® Series 3100 Smart Pressure Transmitter is a microprocessor-based
high performance transmitter, which has flexible pressure calibration, push button
configuration, and programmable using HART® Communication. The Series 3100 is capable
of being configured for differential pressure or level applications with the zero and span
buttons. A field calibrator is not required for configuration. The transmitter software
compensates for thermal effects, improving performance. EEPROM stores configuration
settings and stores sensor correction coefficients in the event of shutdowns or power loss.
The Series 3100 is FM and ATEX approved for use in hazardous (classified) locations. The
100:1 rangeability allows the smart transmitter to be configured to fit any application.



New Products