Floats; Internal Electronics; Accessories - MTS Systems Level Plus Operation And Installation Manual

FLOATS

Model MR transmitters offer numerous floats for different applications such as stainless steel, 3-A sanitary, hastelloy, Teflon, and Nitrophyl
for both product level and interface level. To be able to accurately detect the interface level there needs to be a difference of at least 0.05 in
specific gravities between the product and interface liquids. For detailed information about floats, refer to the 'Accessories Catalog', MTS part
number 551103.
For assistance with selecting a specific float for your application, please contact Technical Support with the following information:
• Specific gravity of liquid(s) being measured
• Process temperature • Process Opening Size
• Vessel pressure
For ATEX, IECEx, and CCoE approvals, Model MR transmitters should be used with a float having an offset weight and made of stainless steel
or Hastelloy C. This allows the float to stay in contact with the pipe to prevent the buildup of an electrostatic charge. For detailed information
about floats, refer to the 'Accessories Catalog', MTS part number 551103.
Non-metalic floats with a projected surface area of less than 5,000 mm² should only be used in Zone 0, Gas group IIA such as float part
numbers 201643-2, 201649-2, 201650-2, 201109, 251115 and 251116. All other non-metallic floats offered by MTS such as, 251939,
251119, 251120 and 252999, should not be used in a hazardous area application.
NITROPHYL FLOATS
Float and dimension reference
C L
76 mm
(3 in.)
31 mm
(1.2 in.) dia.
TEFLON FLOATS
Float and dimension reference
9 mm
(0.35 in.)
76 mm
(3 in.)
61 mm
(2.38 in.) dia.

INTERNAL ELECTRONICS

All transmitters come with two electronic components of a sensing element and a board set. All sensing elements up to 300 inches (7620
mm) are rigid and greater lengths have flexible sensing elements. Flexible sensing elements are only available under 300 inches (7620 mm)
as special orders. The board set consists of a electronic puck and interconnect board. The board set can be configured for single or dual loop
output offering the ability to output the product level, interface level, and temperature. All three variables can be communicated via HART.
The electronic puck can be ordered with or without a display. The optional display is capable of displaying the product level, interface level, and
temperature. Designed into the optional display are three push buttons for local setup of 4 and 20 mA set points.
A temperature sensing function is optional with the Model MR transmitter. The temperature sensing device is a Resistive Temperature Device
(RTD) mounted inside the transmitter's outer pipe assembly. The RTD is a 1000 ohm platinum film device.

ACCESSORIES

MTS also offers a series of displays, housings, converters, and other accessories, please refer to the 'Accessories Catalog', MTS part number
551103.
MTS Sensors
Projected
surface
area
18 mm
(.07 in.) dia.
Magnet
2356 mm²
Added weight
for interface floats
Projected
surface
area
18 mm
(0.7 in.) dia.
Centerline
of Magnet
Magnet
4635 mm²
Model MR Operation and Installation Manual
Part number
201643-2
201649-2
201650-2
Part number
201109
251115
251116
Level Plus ® Liquid-Level Transmitters - M-Series Model MR Analog Transmitter
5
Operation and Installation Manual, Part No.: 550720 Revision K (EN) 02/2016
Product Overview, Components