Is there an alternative option to using Tridicators?

Yes, there is a great alternative option to using Tridicators, although this option is not as compact as a two-in-one pressure and temperature gauge. It requires two separate accessory ports rather than just one to install both a thermometer c/w thermowell and a separate pressure gauge on a pigtail syphon to reduce heat transfer to a standard pressure gauge. This option has four key benefits over using Tridicators as detailed below.

1. With a valve on the pigtail syphon to enable isolation of the pressure gauge, the gauge can be changed out without shutting down the boiler system.
2. Bi-metal thermometers do not have water coming directly into the gauge to sense the water pressure, so there is no risk of leakage inside the gauge.
3. The installation of a thermowell allows the bi-metal thermometer to be changed without shutting down the boiler as the thermowell stays installed. The heat is transferred from the thermowell to the temperature sensing probe and bi-metal sensor.
4. There is no need to change out both gauges if one of the two gauges was to fail.

Additional Resources:

https://support.boshart.com/what-is-a-bimetal-thermometer

https://support.boshart.com/what-does-a-siphon-do

https://support.boshart.com/pressure-gauge-range-selection

https://support.boshart.com/how-do-i-vent-a-liquid-filled-gauge

https://support.boshart.com/what-are-the-advantages-of-installing-a-liquid-filled-gauge

https://support.boshart.com/what-is-3-2-3-gauge-accuracy-and-how-is-it-different-from-full-scale-accuracy