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Thermowell
Model A-500
• 4", 6", 8" and 12" lengths
• Brass or stainless steel material
• Machined from a single piece of metal
• Withstands up to 3000 PSIG pressure
• ¾" external with ½" internal or ½"
...external with ¼" internal thread options
• BSPP ½" external with ¼" NPT internal
...thread available
The A-500 thermowell is machined from a single piece of brass or stainless steel
to provide a rugged and leakproof well for MAMAC Systems' temperature sensors.
Each A-500 thermowell is precisely machined to 0.255" bore to provide a tight fit
for our standard ¼" O.D. probe. This feature also significantly enhances the thermal transfer from the media to the temperature sensor. The external and internal
threads are machined to meet published specifications exactly, and each well is
individually inspected to insure thread integrity. Hexagon wrench flats are provided to assist in installing the well in the pipe. Other thermowells that incorporate
dissimilar metals like brass and copper which are welded/soldered together are
susceptible to leaks caused by thermal shock. In HVAC applications, the temperature of the media may change rapidly, and due to different coefficient of thermal
expansion, a welded/soldered thermowell may leak. The A-500 thermowell has a
single piece construction and, as a result, is immune to leaks which may be caused
by thermal shock or weak welds. The MAMAC A-500 thermowell is available in 4",
6", 8" and 12" lengths to handle pipe diameters from 4" to 24". With more than
four length options, brass and stainless steel material choices, three external
thread options, solid leakproof one piece construction, and precision machining,
the A-500 thermowell can reliably accommodate all HVAC immersion temperature
sensing applications. In order to improve thermal transfer and to eliminate condensation forming within the thermowell, MAMAC Systems offers a high grade thermal
compound (A-505) for the A-500 thermowell.
RoHS
DN500.5
® Registered trademark MAMAC SYSTEMS, Inc.
© Copyright 2013
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A-500
A-500-1 (4")
A-500-2 (6")
A-500-3 (8")
A-500-4 (12")
Internal
Thread
0.750"
AU
4¼" (108 mm)
6¼" (159 mm)
8¼" (210 mm)
12¼" (311 mm)
1.000"
External Thread
2½" (64 mm)
4½" (114 mm)
6½" (165 mm)
8½" (216 mm)
A
U
Weight
.45 lbs (.21 kg)
.60 lbs (.27 kg)
.75 lbs (.34 kg)
1.0 lbs (.45 kg)
2.500"
0.500"
0.250"
0.255"
0.625"
ORDERING INFORMATION: A-500-
Length
1 4 inches/100mm
2 6 inches/150mm
3 8 inches/200mm
4 12 inches/300mm
Example: A-500-2-A-1 : 6” Thermowell with ¾" NPT External and ½" NPT Internal thread size, Brass.
Thread Size
A ¾" NPT External
½" NPT Internal
B ½" NPT External
¼" NPT Internal
E ½" BSPP External
¼" NPT Internal
Material
1 Brass
2 Stainless Steel
CAUTION: Do not use in explosive/hazardous environment or with flammable/combustible media.
2
DN500.5
® Registered trademark MAMAC SYSTEMS, Inc.
© Copyright 2013
Page 3
A-500
MAMAC Systems is the leading global manufacturer of sensors, transducers, control peripherals
and web browser based IP appliances. MAMAC products are used for HVAC and environmental
controls, remote monitoring, alarming, energy metering and industrial automation.
All MAMAC products are manufactured in the USA.
WARRANTY: MAMAC Systems, Inc. and its subsidiaries (hereinafter referred to as MAMAC Systems) warrants its
products to be free of defects in material and workmanship for a period of five (5) years from date of shipment. If a
unit is malfunctioning, it must be returned to the factory for evaluation. A return authorization number (RMA) will be
issued by the customer service department and this number must be written or prominently displayed on the shipping
boxes and all related documents. The defective part should be shipped freight pre-paid to the factory. Upon examination by MAMAC Systems, if the unit is found to be defective, it will be repaired or replaced at no charge to the
customer. However, this warranty is void if the unit shows evidence of being tampered with, damaged during installation, misapplied, misused, or used in any other operating condition outside of the unit’s published specifications.
MAMAC Systems makes no other warranties or representations of any kind whatsoever, expressed or
implied, except that of title. All implied warranties including any warranty of merchantability and
fitness for a particular purpose are hereby disclaimed. User is responsible to determine suitability for
intended use.
LIMITATIONS OF LIABILITY: The remedies of buyer set forth herein are exclusive and the total liability of
MAMAC Systems with respect to this order, whether based on contract, warranty, negligence, indemnification, strict
liability or otherwise, shall not exceed the purchase price of the product upon which liability is based. In no event
shall MAMAC Systems be liable for consequential, incidental or special damages. MAMAC Systems
reserves the right to change any specifications without notice to improve performance, reliability, or function of our
products.
Every precaution for accuracy has been taken in the preparation of this manual, however, MAMAC Systems neither
assumes responsibility for any omissions or errors that may appear nor assumes liability for any damages that result
from the use of the product in accordance with the information contained in the manual.
DN500.5
® Registered trademark MAMAC SYSTEMS, Inc.
© Copyright 2013
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