End Devices
The 20 Series (2 inch/51 mm dial) and the 25 Series (2-1/2 inch/64 mm dial) Swichgage models are diaphragm-actuated, temperature-indicating gages with built-in electrical switches for tripping alarms and/or shut-down devices. Ranges are available from 32°-120°F (0°-45°C) through 300°-440°F (160°-220°C).
The gage mechanism is enclosed in a steel case coated to resist corrosion. A polycarbonate, break-resistant lens and a polished, stainless steel bezel help protect this rugged, built-to-last instrument. These vapor-actuated gages feature a sealed capillary tube and a sensing bulb. When subjected to heat, the liquid in the sensing bulb changes to vapor creating pressure against the diaphragm mechanism. The diaphragm translates this vapor pressure into a mechanical gage reading.
For series 20T and 25T, the gage pointer acts as a temperature indicator and as one switch pole which completes a circuit when it touches the adjustable limit contact. Contact(s) are grounded through the Swichgage case. They have a self-cleaning motion to enhance electrical continuity.
Sales Bulletin: 20T/25T Series
94031 rev. 2014/11/13
Installation Instructions: 20T/25T Series
00-02-0168 rev. 2016/03/01
Sales Bulletin: Sensing Bulb/Scale/Capillary: 20T/25T Series
8428 rev. 2014/11/08
Sales Bulletin: Thermowell Specs: SPL/45TE Series
T-9003B (00-02-0046) rev. 2004/02
The A20 Series (2 inch/51 mm dial) and the A25 Series (2-1/2 inch/64 mm dial) Swichgage models are diaphragm-actuated, temperature-indicating gages, with built-in electrical switches for tripping alarms and/ or shutdown devices. Ranges are available from 32°-120° F (0°-45° C) through 300°-440° F (160°-220° C).
All models of these rugged, built-to-last instruments are fully sealed from the environment by the unique combination of a polycarbonate case and lens, a polished stainless steel bezel and O-ring seals. These vapor/pressure actuated gages feature a sealed capillary tube and a sensing bulb. When subjected to heat, the liquid in the sensing bulb changes to vapor creating pressure against a diaphragm mechanism. The diaphragm translates this vapor pressure into a mechanical gage reading.
For series A20T and A25T, the gage pointer acts as a temperature indicator and as one switch pole which completes a circuit when it touches the adjustable limit contact. Contact(s) are isolated from ground. They have a self-cleaning motion to enhance electrical continuity.
Sales Bulletin: A20T/A25T Series
95026 rev. 2017/10/19
Installation Instructions: 20T/25T Series
00-02-0168 rev. 2016/03/01
Sales Bulletin: Sensing Bulb/Scale/Capillary: 20T/25T Series
8428 rev. 2014/11/08
Sales Bulletin: Thermowell Specs: SPL/45TE Series
T-9003B (00-02-0046) rev. 2004/02
The TDXM-DC now gives you a unique configurable temperature scanner/pyrometer with a built-in power supply. A new design features a 7-character, 7-segment Liquid Crystal Display window with 1/2 inch (13 mm), easy-to-read characters. Also located on the faceplate are membrane keys for easy configuring.
Highly reliable and versatile, the TDXM-DC accepts up to 24 type J or K grounded or ungrounded thermocouples. Each channel has three adjustable set points SP1, SP2 and SP3. The SP1, SP2 and SP3 set points correspond to the SP1, SP2 and SP3 outputs.
Additionally it has the selectable feature to monitor and alarm or shut down on deviation from an average for up to two groups of temperatures (GRP/DEV; deviation from average). One group could be exhaust temperatures, and another group could be bearing temperatures.
The TDXM-DC is capable of communicating with controllers, PLCs, computers or SCADA (Supervisory Control & Data Acquisition) systems by a built-in RS485 serial communications port. The TDXM-DC is available for 10 - 32 VDC systems.
Sales Bulletin: TDXM-DC
00064 rev. 2017/08/01
Installation & Operation Manual: TDXM-DC
00-02-0511 rev. 2017/08/01
Wiring Diagram: TDXM-DC
Sequence of Operations: TDXM-DC, SP3 Latch
The TDX6 is an advanced design six-point temperature scanner and pyrometer. It continually scans up to six thermocouples and sequentially displays the thermocouple number and its reading. Each sensor input has a field settable trip point for alarm, shutdown or control. A read/scan selector allows the operator to set and view each trip point.
With the selector in the scan mode, a thermocouple read push button provides a means to manually toggle through the six channels and to lock in on a specific channel. Normal scanning will resume approximately three seconds after releasing the push button. All trip points are continually armed and active during the scanning process.
Type J or K, grounded or ungrounded thermocouples are accommodated. Other types are available upon request. The TDX6 can interface with other Murphy Selectronic Tattletale annunciators and micro-controllers. It is rated for Class I, Division 2, Group D, hazardous areas and is available for operation from CD ignition, 120 VAC or 24 VDC.
Sales Bulletin: TDX6
9106 rev. 2015/03/04
Installation Instructions: TDX6
TDX-9110N (00-02-0169) rev. 2014/05/06
Murphy’s model MDTM89 is an electronic, dual temperature monitor. It monitors two thermocouples, displays the temperature of the thermocouple selected and has adjustable trip points for each input. A toggle switch provides for selection of the thermocouple to be displayed and/or the temperature trip point to be checked/adjusted.
If either trip point is reached, the associated output turns on and can be used as a control signal or to initiate alarms and/or shutdown. A Push to Read button, located below the selector switch, allows the operator to check the trip point and to see its value as adjustments are made. Two potentiometers, one on each side of the thermocouple selector switch, are provided for field adjustment of the trip points.
There are four basic models. Two of the models are powered by capacitor discharge ignition and have either an FET or an SCR output. One model operates from 12- or 24-VDC and has an FET output. Standard display is in degrees Fahrenheit; degrees Celsius is optional.
Sales Bulletin: MDTM89 Series
8911 rev. 2014/11/14
Installation Instructions: MDTM89 Series
00-02-0165 rev. 2013/03/11
The thermocouples are encased in a 1/4 inch diameter 316 stainless steel tubing sheath with stainless steel Bell Spring for strain relief. The initial offerings are K type thermocouples with 6-inch and 10-inch long 1/4- inch diameter probes. The thermocouples are shipped straight but can be bent with standard tubing benders anywhere along its length to a 90° angle to minimize clearance required and help prevent damage due to personnel working on the unit.
The thermocouple is tip sensitive to minimize ambient temperature influence and should be inserted between 25% and 75% of the piping inside diameter or enough to minimize any skin temperature affect on the tip of the probe when installed in vessels.
Features include:
· Stainless steel transition sealing gland with a stainless steel Bell Spring for strain relief
· Standard bore through stainless steel compression fitting for securing the thermocouple in the thermowell at the appropriate depth
· Can be inserted directly into a low-pressure application process through a standard 1/4-inch stainless steel bore through tubing compression fitting
· Enables a run from the point of measurement to the nearest conduit entry, junction box or all the way to the panel housing the readout and monitoring instrument. Can also be installed in a cable tray.
· The thermowell assembly comes with a stainless steel bore through compression fitting and ferrule saving installation time and money
Sales Bulletin: Thermocouples
0610107 rev. 2016/08/25
