LVR21美国工业流量计LVR21
LVR21
流量与液位 » 液位测量 » 连续浮漂式液位变送器和点液位指示器 » LVR20/30 Series
液位变送器，适用于深至六英尺的液位
LVR20/30 Series
Rugged 316SS Construction
4-20 mA or Resistance Output
Immune to Changes of Density and Dielectric
1 /4 " Resolution
产品描述
The OMEGA® LVR20 and LVR30 Series continuous liquid level sensors operate on a basic voltage divider network principle. As the float rises, a magnet in the float closes a series of reed switches in sequence which varies the tapped-off portion of the voltage divider resistor network. The LVR20 has the basic voltage divider output—the regulated DC voltage input equals the maximum voltage output. The LVR20 has a nominal 1,200 resistance; thus, with a 10 Vdc supply, 8.3 mA of current are required.
The OMEGA® DPF52 or DP24-E panel meters can be used to power and display the resistance from the LVR20; when relays are required, the DP25E-A meter can be used. For maximum accuracy, the readout device for the LVR20 should be zero and span adjusted after wiring is completed to compensate for any effects due to the resistance of the lead wires. The LVR20 can also be made intrinsically safe when used with OMEGA’s intrinsic safety barriers and when properly powered. The LVR30 Series is provided with a signal conditioner to provide a 4-20 mA output when powered by 10-30 Vdc. The LVR30 Series cannot be made intrinsically safe.
All LVR30 units are supplied with a J-box with screw terminal connections. All LVR20 units are supplied without a J-box with 24 inches of bare wire coming out of the top of the unit with a 1?2 MNPT conduit connection. All LVR20 and LVR30 Series units can be wired for increasing output with either increasing or decreasing height of liquid; standard output is increasing output with increasing height. For other lengths, adaptor systems are available. They consist of two parts: the LVR-C coupling (2 x 2 FNPT) and an LVR-A pipe nipple (2 x 2 MNPT) of various lengths to change the insertion depth of the LVR20 or LVR30 sensor. When using the adaptors, a zero offset is introduced into the output signal which must be compensated for in the readout device (for example, the mA signal will not go down to 4 mA, nor will the voltage output go down to zero).
Retaining clip pliers are required to remove the float when using the adaptor system.
产品编号 产品描述
Isolated 4 to 20 mA Output and J-box
LVR31 1 ft 4-20 mA output
LVR33 3 ft 4-20 mA output
LVR34 4 ft 4-20 mA output
LVR35 5 ft 4-20 mA output
LVR36 6 ft 4-20 mA output
Voltage Divider (Voltage In = Voltage Out)
LVR21 1 ft long indicating length, Voltage Divider, Voltage in = Voltage out
LVR22 2 ft long indicating length, Voltage Divider, Voltage in = Voltage out
LVR23 3 ft long indicating length, Voltage Divider, Voltage in = Voltage out
LVR24 4 ft long indicating length, Voltage Divider, Voltage in = Voltage out
LVR25 5 ft long indicating length, Voltage Divider, Voltage in = Voltage out
LVR26 6 ft long indicating length, Voltage Divider, Voltage in = Voltage out
Accessories
LVR-A4 Pipe Nipple, 304 SS, 150 lb fittings, 2 x 2 MNPT, 4" indicating length change
LVR-A6 Pipe Nipple, 304 SS, 150 lb fittings, 2 x 2 MNPT, 6" indicating length change
LVR-A6 Pipe Nipple, 304 SS, 150 lb fittings, 2 x 2 MNPT, 6" indicating length change
LVR-A7 Pipe Nipple, 304 SS, 150 lb fittings, 2 x 2 MNPT, 7" indicating length change
LVR-A9 Pipe Nipple, 304 SS, 150 lb fittings, 2 x 2 MNPT, 9" indicating length change
LVR-A11 Pipe Nipple, 304 SS, 150 lb fittings, 2 x 2 MNPT, 11" indicating length change
LVR-A13 Pipe Nipple, 304 SS, 150 lb fittings, 2 x 2 MNPT, 13" indicating length change
LVR-C 150 lb 304 SS Coupling, 2 x 2 FNPT
U24Y175 24 Vdc, 175 mA Power Supply
DPI8 1/8 DIN Display Panel Meter
产品编号 产品描述
Isolated 4 to 20 mA Output and J-box
LVR31
LVR33
LVR34
LVR35
LVR36
Voltage Divider (Voltage In = Voltage Out)
LVR21
LVR22
LVR23
LVR24
LVR25
LVR26
Accessories
LVR-A4
LVR-A6
LVR-A6
LVR-A7
LVR-A9
LVR-A11
LVR-A13
LVR-C
U24Y175
DPI8
LVR20-15 INCHES
LVR20-19 INCHES
LVR201
LVR201-RS
LVR202
LVR202-RS
LVR203
LVR203-RS
LVR204
LVR204-RS
LVR205
LVR205-RS
LVR206
LVR206-RS
LVR21
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