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Standard Bulb - 304 Stainless Steel
Plain Bulb - 304 Stainless Steel
Air Bulb - 304 Stainless Steel
A STANDARD BULB is made up of the 2 1/4" x 5/8" sensing unit plus a bendable stem on a sliding union connection which is mounted . The STANDARD BULB is provided in variable lengths "A" to match different length sockets - i.e. 4", 6", 9", 12", 15", 18", 24". A 1/2" NPSM sliding union connection is standard but a 1-1/4"-18 sliding union connection can be supplied instead. The STANDARD BULB is used where the sensing element is to be mounted in a socket, hub or flange.
A PLAIN BULB is the same as a STANDARD BULB except that the sliding union connection is not included. The PLAIN BULB is provided in a single length as shown; longer lengths are available on special order. The PLAIN BULB is used where the sensing element is not to be mounted in a socket, hub or flange and/or where the stem is to be bent to fit a particular application.
An AIR BULB is a more sensitive sensing element then the STANDARD or PLAIN BULB but is longer overall and cannot be used in a socket. It is provided in a single configuration. Special supports for AIR BULBS are available - i.e. the split flange or the standoff support.
Available with matching thermowells in a variety of materials of construction.
Designed as an alternate to standard MIL-T-19646 Gas Actuated Dial Thermometers with dual sensors, gas & electronic. Can replace standard existing units without installing new thermowells.
Primary element to be gas actuated remote reading thermometer built in accordance with MIL-T-19646 AMD. 7, Dial sizes 3-1/2" & 4-1/2", Bulb ¼" diameter Class C style with ¾-28 Union connection, Insertion length 2" or 4", Capillary length up to 20 feet maximum , Connection back or bottom, Mounting surface or flush panel.
Second Element three wire, 100 Ohm Platinum RTD, Alpha= 0.00385, 0.1 Ohm accuracy at 0 Deg C, 1/8 inch diameter.
Includes an integral electrical connection ( MS3451W10-3P OR MS3452W10-3P) to mate with cable connector MS3456W10-3S with back shell strain relief M85049/52-1-10W. The cable connector is supplied as part of the unit.
The stem diameter will not exceed 0.379 RTD & Bimetallic inclusive.
The Bimetallic stem & RTD will extend the same length as required to fit existing thermowell with 0.380 bore & 3/4-28 UNS-2 female thread length to be specified by customer in Specification Class # .