Trerice Logo

When Mr. H.O. Trerice founded our company back in 1923, America was a different place. We were a nation of industry. A country whose landscape was dotted with steel mills, foundries and factories. The entrepreneurial spirit of the twenties was in full swing, giving rise to a variety of new and exciting businesses. And the fledgling American automotive industry was just getting ready to take off on a fabulous joyride.

In this bustling and excitement-charged environment, Mr. Trerice saw both a need and an opportunity. The very backbone of America’s industrial growth, the boiler rooms and powerhouses of her factories and foundries, needed a reliable source of accurate, durable instrumentation and controls. He was determined to become that source.

And so, the H.O. Trerice Co. was born: designing, engineering and manufacturing the reliable, high quality, steam, boiler and HVAC instrumentation and controls early industrial America would use to power her way into the future.

Today, the H.O. Trerice Co. provides a full spectrum of the finest quality temperature and pressure instrumentation and controls demanded by industries the world over. Our marketplace literally is the world, and we are serving our customers every day all over the globe.

Wherever used, Trerice instrumentation and controls are considered the standard for quality and dependability. Chemical plants, food processing, petroleum refining, pharmaceutical manufacturing, the list of industries that rely on Trerice goes on and on.
Pressure Gauges

Process Gauges

Solid Front, blow-out back safety gauges well suited for most process requirements.

450 Series – Solid Front Field Liquid Fillable – Turret Case
750 Series – Solid Front – Field Liquid Fillable – Stainless Steel Case

Industrial Gauges

Accurate and durable gauges for a broad spectrum of industrial needs.

500X Series – Dial Sizes thru 12″ – Cast Aluminum Case
700 Series – Field Liquid Fillable – Stainless Steel Case

Commercial and Contractor Gauges

Compact and dependable gauges used by construction and HVAC industries.

600CB Cast Aluminum Case
610CB Glass Filled Nylon Case
620B Stainless Steel Case
690 Series Multiple Stainless Steel Case Styles

Utility Gauges

Economically priced gauges suited for a variety of general applications.

D80 Series Liquid Filled – Stainless Steel Case
800B Series Dry – Black Finished Steel Case
800LFB Liquid Filled – Plastic Case

Specialty Gauges

Products designed to meet the needs of specialized industrial markets, including low-pressure gas, sanitary and remote reading applications.

760B – Low Pressure Gauge – Black Finished Steel Case
766SS – Low Pressure Gauge – Stainless Steel Case
700TA – Sanitary Gauge with Integrated Diaphragm Seal
700Plus – Industrial Transmitter Gauge

Pressure Gauge Options & Accessories

Enhancements to customize and optimize pressure gauge performance, along with the necessary accessories to complete any installation.

Optional Case Styles
Optional Features

Diaphragm Seals

Protective devices that isolate a pressure sensing instrument from the process fluid being monitored. Especially useful when measuring corrosive or viscous pressure mediums.

In-Line Threaded
Drop-in Welded
Mini & Compact

Temperature Instrumentation

Industrial Thermometers

Trerice Industrial Thermometers are either of the liquid-in-glass or light-powered digital type.

SX9 Solar Therm – Light-Powered Digital
Adjustable Angle Series
Rigid Stem Series
BX Plus Series – with Integrated RTD
Retort Series – for Food Processing
Hydro-Therm Series
Econo-Therm Series
Options & Accessories
Thermowells for Industrial Thermometers
Thermowells for Econo Thermometers

Dial Thermometers

Direct or Remote mounted thermometers suited for a variety of temperature measuring requirements

Remote Mounted 3 ½” Stainless Steel Case
Remote Mounted 4 ½” – 8 ½” Aluminum Case
Direct Mounted 4 ½” & 6″ Universal Angle
Direct Mounted 3 ½” & 4 ½” Adjustable Angle
Thermal System Selection
Temperature Ranges
Options & Accessories
Thermowells for Dial Thermometers

Bimetal Thermometers

Direct Mounted thermometers with all stainless steel construction and hermetically sealed cases are designed for use in demanding industrial applications.

Adjustable Angle
Bottom Connect
Rear Connect
Bimetal Plus – with Integrated Sensor
Options & Accessories – Bimetals
Thermowells for Bimetal Thermometers

Electronic Temperature Sensors

Sensors providing an Electronic Signal to a Controller or Indicating Device.

RTD & Thermocouple Sensors
Options & Accessories
Digital Temperature Indicator TRD20 Series
Digital Temperature Indicator TRD16 Series
Indicator Selector Switch TRS16 Series
Thermowells for Sensors


Provide leak-tight protection for applications where the process media may be corrosive or contained under pressure.

for Industrial Thermometers
for Econo Thermometers
for Dial Thermometers
for Bimetals, Thermocouples & RTDs

Regulators and Control Valves

Temperature Regulators

Provide reliable temperature control without the need for an external power source.

91000 Series – (91000, 91400, 91600)
Thermowells for 91000 Series
Thermal System Selection for 91000 Series
Valve Bodies for 91000 & 91400
Valve Bodies for 91600
91000XT Series Tank Thermostat

Pressure Regulators

Suitable for a variety of pressure regulating and pressure reducing applications.

921 Series (High Capacity)
988 Series (Steam)
1002 Series (Water)
1100 Series (Pipeline Strainer)


Electronic PID and Electric Contact controllers providing single-loop control.

TR890 Series Electronic PID Controller
L84000 Series Electronic Contact Controller
Thermal System Selection for L84000
Thermowells for L84000

Controller Accessories

Products required for the design and installation of a complete control loop.

Solenoid Valve (960 Series)
I/P Transducer (TA901)
Air Filter / Regulator (TA987)
Solid State Relay (TA600)
Enclosure (TA302)
Temperature Sensors (RTD & Thermocouple)
Thermowells for Temperature Sensors

Control Valves

Pneumatic and Electric operated valves, available in a variety of body materials including Bronze, Cast Iron and Stainless Steel. Control valves are the final element of a control loop.

910 Series Compact Control Valve
910 Valve Body – Bronze (Single Seat)
910 Valve Body – Bronze (Double Seat)
910 Valve Body – Cast Iron (Double Seat)
910 Valve Body – Cast Steel (Single Seat)
910 Valve Body – Stainless Steel (Single Seat)
910T Valve Body – Bronze
910T 3-Way Valve – Bronze
910T 3-Way Valve – Cast Iron
910T 3-Way Valve – Stainless Steel
910EP Valve Body – Bronze (Equal Percentage)

940 Series – Heavy-Duty Control Valve
940 Valve Body – Bronze (Single Seat)
940 Valve Body – Cast Iron (Single Seat)
940 Valve Body – Cast Iron (Double Seat)
940 Valve Body – Stainless Steel (Single Seat)
940 3-Way Valve – Bronze
940 3-Way Valve – Stainless Steel
940 3-Way Valve – Cast Iron

940E Series – Electric Motor Control Valve
940E Valve Body – Bronze (Single Seat)
940E Valve Body – Cast Iron (Single Seat)
940E Valve Body – Cast Iron (Double Seat)
940E Valve Body – Stainless Steel (Single Seat)
940E 3-Way Valve – Bronze
940E 3-Way Valve – Cast Iron
940E 3-Way Valve – Stainless Steel

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