Mid-West Instrument

Mid-West Instrument is a manufacturer of differential pressure gauges and switches, pulsation snubbers, pressure limiting valves, pitot tubes and flow elements, and backflow prevention test kits. Lesman is an authorized representative for Mid-West products in Northeastern Illinois, Northwest Indiana, Eastern Wisconsin, and Michigan's Upper Peninsula.

Calibration and Testing Instruments
Mid-West Instruments Model 830 Backflow Prevention Test Kit
Mid-West Instruments Model 845-2 Two-Valve Backflow Prevention Test Kit
Mid-West Instruments Model 845-3 Three-Valve Backflow Prevention Test Kit
Mid-West Instruments Model 845-5 Five-Valve Backflow Prevention Test Kit
Flow Elements
Delta Tube® Averaging Pitot Tubes
Differential Pressure Gauges
Mid-West Instruments Model 105/106 6" Dial Bellows-Type Differential Pressure Gauge
Mid-West Instruments Model 109 6" Dial Bourdon Tube-Type Differential Pressure Gauge
Mid-West Instruments Model 120 2.5" Dial Piston-Type Differential Pressure Gauge
Mid-West Instruments Model 122 2.5" Dial Piston-Type Differential Pressure Gauge
Mid-West Instruments Model 123 2.5" Dial Piston-Type Differential Pressure Gauge
Mid-West Instruments Model 130 4.5" Dial Diaphragm-Type Differential Pressure Gauge
Mid-West Instruments Model 140/141 2.5" Dial Delta Meter® Diaphragm-Type Differential Pressure Gauge
Mid-West Instruments Model 142 2.5" Dial Delta Meter® Diaphragm-Type Differential Pressure Gauge
Mid-West Instruments Model 220 4.5" Dial Piston-Type Differential Pressure Gauge for Hazardous Locations
Mid-West Instruments Model 240 4.5" Dial Diaphragm-Isolated Differential Pressure Gauge for Hazardous Locations
Differential Pressure Indicators for OEM Use
Mid-West Instruments Model 126/127 Piston-Type Differential Pressure Gauge/Switch
Mid-West Instruments Model 146 Diaphragm-Type Differential Pressure Gauge/Switch
Mid-West Instruments Model 444 Plastic Differential Pressure Gauge
Mid-West Instruments Model 522 Aluminum Body Differential Pressure Indicator
Mid-West Instruments Model 555 Plastic Differential Pressure Gauge with Optional Switch Output
Accessories
Mid-West Instruments Model 150 Vari-Damp® Pulsation Dampener
Mid-West Instruments Model 200 Gauge Minder® Pressure Limiting Valve