HVAC Selection Guide - Spectrum Sensors & Controls - #2

Continuous freeze/thaw cycles provide ice an opportunity to exert a significant mechanical force on the wire or cable allowing water to breach the end seal of a standard sensor probe, thereby providing a direct path to the thermistor element.

Our unique, swaged end design provides an excellent moisture seal between the cable and housing, isolating the thermistor element from outside moisture and stresses associated with freezing and thawing.

Monitors Copper Tubing Temperature: Many HVAC applications require a sensor that can monitor the temperature of a standard 3/8" or 1/2" OD copper tube, and field installation methods can vary widely.

Beryllium Copper Spring Clip: Performs a dual function by holding the sensor rigidly in place on a straight section of 3/8" or 1/2" copper tubing while providing an excellent thermal connection from the copper tube to the sensor. This sensor is ideal for inlet or outlet refrigerant sensing in HVAC applications.

Monitor Refrigerant Temperatures: HVAC engineers have long searched for cost effective, easy to install sensors capable of monitoring the refrigerant temperature in condenser and evaporator coils. In these applications sensor attachment has been a difficult design problem since the only suitable place to mount the sensor is on the coil return bend.

Plastic Overmolded Copper Clip: Our specially designed clip has an integrated fast response thermistor element and snaps onto 3/8" return bends. The sensor is housed in a small bulb connected to the copper clips, maximizing sensing surface area.

Rapid Response and Stable Mounting: The small diameter stainless steel tube allows for a rapid response to changes in temperature while the rugged flange allows for easy installation and stable mounting. This sensor is an excellent choice for furnaces, air handlers and similar applications.

Compatible with Major Control Systems: The air

temperature sensor with flange is compatible with almost all major control systems on the market today.

Our wire harnesses consist of a wide array of temperature sensor assemblies incorporating other electrical components such as other types of sensors, switches, relays, solder and crimp terminals, pins and much more.

As a leading manufacturer of cable assemblies and harnesses for the HVAC industry we have tooling available for many of the most popular connector systems and offer excellent design and engineering support. All cable and wire harnesses are fully tested to ensure they meet or exceed all electrical and mechanical specifications.

Design Flexibility: The stainless steel housings can be manufactured in a wide range of hex sizes, thread styles, wall thicknesses, material grades,and immersion lengths to fit just about any immersion application.

The stainless steel housing is extremely rugged and sealed from the environment assuring a fast response while protecting its sensing element.

The stainless steel tube can be manufactured in a wide range of diameters, wall thicknesses, grades of stainless steel and lengths. This general purpose design provides for a fast response and excellent thermal tracking.

The tube provides excellent protection of the sensing element from various environmental conditions and can accommodate a moisture resistant internal construction for high moisture environments.

The stainless steel tube can be manufactured in a wide range of diameters, wall thicknesses, grades of stainless steel and lengths. This general purpose design provides for a fast response and excellent thermal tracking.

The tube provides excellent protection of the sensing element from various environmental conditions and can accommodate a moisture resistant internal construction for high moisture environments.

The stainless steel tube is manufactured in a unique process that allows for consistent, reliable wall thicknesses allowing for accurate, fast thermal response for the embedded sensing element.

The stainless steel tube is brazed to a brass hex body that offers strength to the overall assembly while an integrated connector can be utilized to simplify the installation of the sensor.

Our duct temperature sensor can be configured using a

variety of sensing elements including highly stable NTC thermistors, RTD elements

and silicon based PTCs. This flexibility enables users

to address their specific HVAC

temperature application.

To simplify installation, we

utilize a standard 2" x 4"

electrical utility box with

mounting tabs, pre-formed

knockouts for conduit connections and medical grade foam padding to absorb vibration.

Eliminates Exposure to Moisture: Many are mounted in areas subject to moisture due to condensation. Thermistors can be seriously affected by long-term exposure to moisture, which can cause low or erratic resistances. It is imperative that the internal construction of the probe assembly seals off all moisture paths to the thermistor.

Our proven design provides an excellent moisture seal between all parts of the system and deters water from entering the assembly.

Created by utilizing a special combination of wire and epoxies to help protect the thermistor-sensing element

• Excellent for freeze/thaw applications

• Standard housing: 0.25" OD nickel-plated brass

• Wide operating temperature range: -40°C to 125°C

• Accommodates a wide array of thermistor sensing elements

• Standard with 10 ft. of AWG #22, PVC insulated

zipcord cable

• Various termination types of connector pins or lugs

• Variety of thermistor curves and resistances available

• Cable lengths, housing types and wire styles can be specified

The plastic molded

body is designed to

allow the use of a wire tie or

hose clamp for quick installation

of the sensor assembly.

Fast Response: Our small diameter aluminum tube allows for rapid responses to changes in temperature while the surrounding molded plastic housing isolates the sensor thermally from the outside environment and seals it from moisture.

Configurable with Solid-state Temperature Sensors: The

strap-on assembly can be configured with a range of solid-state temperature sensors from thermistors to RTDs to other types and is compatible with most major control systems.

• Easy mounting, fits a wide variety of tube sizes

• Standard with 10ft. of PVC

jacketed cable

• Small diameter aluminum tube allows fast thermal response

• Molded plastic body isolates sensor from outside environment

• Flat area on plastic holds wire tie or hose clamp

• Sensor types including thermistor, RTD and other solid-state temperature sensors

• Range of sensor accuracies and values

• Cable lengths and styles, connectors and terminations can be specified

Previously, air sensors for enclosures had to be surface mounted, typically measuring the temperature of the sheet metal they were attached to instead of the air temperature of the enclosure.

Special Clip Design: Allows the sensor housing to be easily and securely snapped into a

0.30" diameter pre-drilled hole. This isolates the sensing element from the sheet metal allowing for an accurate reading.

Sturdy Construction: Our

special clip design is added to our air temperature sensor that features a potted metal housing and a plastic molded body that thermally isolates the assembly from the environment.

• Easy installation - just snaps in to 14 to 18 gauge sheet metal

• Extremely accurate and responsive

• Low cost sensor assembly

• Extra strain relief - housing and plastic molded body provide additional protection

• Standard with 10ft. of PVC

insulated leads

• Variety of thermistor curves and resistances available

Defeating Overheating and Failure: Failure or overstress conditions can cause hermetic motors to overheat and run beyond their rated temperature range, potentially shutting down the entire A/C system and leading to expensive repairs.

Our rugged motor sensor is very reliable and reacts quickly to changing temperatures. All materials withstand the higher temperatures found in these applications, especially in the varnish and bake operations. Our epoxy case is extremely rugged and allows for a high isolation between the sensor and case and the sensor and lead wires.

• Rugged construction

• Tested to 10,000 freeze/thaw thermal cycles

• Waterproof to IP68

• Quick response and excellent thermal tracking

• Operating temperature range: -40°C to 105°C

• Standard with 3 ft. of AWG #22, PVC jacketed cable

• Variety of thermistor curves and resistance values

• Cable lengths and terminals can be specified

• Compatible with our Clip-On for 3/8" and 1/2" copper pipes

• Quick response and excellent thermal tracking

• Simple installation, attaches directly to pipe surfaces

• Low cost sensor

• Rugged construction: 0.25" OD stainless steel housing

• Moisture resistant internal assembly available

• Standard with 10 ft. of AWG #22, PVC insulated zipcord cable

• Variety of thermistor curves and resistances available

• Cable lengths and colors can be specified

• Easy installation - just snaps on

• Cost effective design

• Quick response and excellent thermal tracking

• Sturdy construction

• Standard with 10 ft. of AWG#22 PVC jacketed cable

• Well suited for use in HVAC diagnostic equipment

and tools

• Sensor tpes including thermistor, RTD and other solid-state temperature sensors

• Range of sensor accuracies and values

• Cable lengths and styles, connectors and terminations can be specified

• Mounting tabs for easy installation

• Quick response and excellent thermal response

• Wide operating temperature range: -40°C to 105°C

• Probe lengths of either 4" or 8"

• Weatherproof junction box

• Easy mounting

• General purpose flanged design with 2 mounting holes

• All metal construction for ruggedness and fast response

• Simple, low-cost sensor

• Operating temperature range: -40°C to +100°C

• Standard with 10ft. of PVC

jacketed cable

• Sensor types including thermistor, RTD and other solid-state temperature sensors

• Range of sensor accuracies and values

• Cable lengths and styles, connectors and terminations can be specified

• Various insertion lengths, flange sizes and styles

• Complete harness assembly including connector and

all sensors

• Available with other types

of sensors including humidity, pressure and others

• Simple, low-cost design

• Sensor types including thermistor, RTD and other solid-state temperature sensors

• Range of sensor accuracies and values

• Cable lengths and styles, connectors and terminations can be specified

• Sensor assembly styles including air, immersion, snap-in, clip-on and others

• Easy mounting - threaded

housing just screws in

• Fast thermal response and excellent thermal tracking

• Sturdy construction - housing

sealed from the environment

• Suitable for sensing a wide range of liquids

• Variety of hex sizes, thread styles and immersion lengths

• Sensor types including thermistor, RTD and other solid-state temperature sensors

• Range of sensor accuracies and values

• Cable lengths and styles, connectors and terminations can be specified

• Moisture resistant internal construction

• Sturdy construction - all

metal housing sealed from the environment

• Suitable for air and surface

sensing as well as immersion

• Tubing can be altered/bent for retention purposes

in thermowell

• Variety of housing diameters

(English and metric), lengths,

wall thicknesses, and grades of stainless steel

• Sensor types including thermistor, RTD and other solid-state temperature sensors

• Range of sensor accuracies and values

• Cable lengths, styles and connectors can be specified

• Bent tube design allows for

easy insertion and retention

• Sturdy construction - all

metal housing sealed from the environment

• Wide range of wall thicknesses and grades of stainless steel available

• Variety of housing diameters

(English and metric), lengths, wall thicknesses, and grades of stainless steel

• Sensor types including thermistor, RTD and other solid-state temperature sensors

• Range of sensor accuracies and values

• Cable lengths, styles and connectors can be specified

• Unique brass/stainless

design allows for rugged, reliable service for long insertion lengths

• Fast thermal response and excellent thermal tracking

• Brass hex provides strength

• Accommodates a wide variety of sensors

• Variety of housing diameters (English and metric), lengths, wall thicknesses, and grades of stainless steel and brass

•Brasshexsizes

• Sensor types including thermistor, RTD and other solid-state temperature sensors

• Range of sensor accuracies and values

• Cable lengths, styles and connectors can be specified

• Rugged design ideal

for motor windings

• Epoxy case design provides

rigidity and electrical isolation

• Withstands varnish andbakeoperations

for hermetic motors

• Teflon insulated lead wires

for extended range

• Wide range of tube

diameters and lengths

• Variety of housing diameters

and lengths

• Sensor types including high temperature NTC thermistors,

RTDs and other solid-state temperature sensors

• Range of sensor accuracies and values

• Cable lengths, AWG#

and styles, connector and terminations can be specified