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Liquid
Nitrogen Level Controllers
DUAL SENSOR LN2 LEVEL CONTROLLER (SN2-6)
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The Dual Sensor
Controller automatically controls the liquid level between a high and
low sensor. When the liquid level drops and exposes the lower sensor,
the unit will start to fill the trap. After the liquid nitrogen
contacts the upper sensor the solenoid is deactivated, stopping the
fill cycle. |
Ideal
applications: Level controlling in medium to large traps and reservoirs.
TIME CYCLE LN2 LEVEL CONTROLLER (SNT-6)
| This controller
automatically fills for a set amount of time. When the level drops and
exposes the sensor, the solenoid will activated and start the transfer.
As the level begins to rise above the sensor the timer will start. The
time interval is adjustable from the front control knob, it's nominal
range is 0 - 6 Min. The solenoid output will turn off when the time
runs out. |
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Ideal
Applications: Level controlling in small to medium traps and reservoirs.
DELAY TIME CYCLE LEVEL CONTROLLER (SNTDF-6)
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The delay fill
timer controller allows for the time between fills to be controlled.
The standard interval is 0 to 20 hours, other interval either longer or
shorter maybe ordered. When the time cycle expires the unit will
activate thereby filling the trap. When the liquid comes in contact
with the sensor, the solenoid will close and the timer will restart. |
Ideal
Applications: Traps where you can not get a sensor to the low liquid
level. Sensor mounts in vent line or top of trap.
SINGLE SENSOR LN2 MONITOR (SN1-6)
The single sensor controller activates a
solenoid valve when the liquid level drops and exposes the sensor. The
solenoid is deactivated when the level rises and the sensor is immersed.
Ideal applications: Level monitors and alarm indicators.
SINGLE SENSOR AUTOMATIC DEWAR FILLER (SN2-6ADF)
| The SN2-6ADF is
a push button operated dewar filler that is designed for manual
operation to start the fill cycle and an automatic shutoff. The sensor
is positioned so that it will come into contact with the liquid when
the trap is full. To operate the fill cycle, press the button located
on the front panel. When the dewar is full and the sensor is immersed,
the unit automatically signals for the liquid nitrogen to stop flowing. |
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Ideal
applications: Filling dewars
Features . . .
- Automatically maintains liquid nitrogen levels in
cryogenic baffles, traps and coils.
- Wide variety of controllers for every application.
- Integrated circuitry.
- Ultra small sensors.
- Sensor length is extendable.
- High and Low level alarm options.
- Fully integrated comparator, coupled with precision
resistors, provide the quickest response available.
- Two regulated power supplies for sensor and logic
circuitry, ensure reliable operation under varying AC line and
transient conditions.
- Dual wound transformer provides a factory
configured 115/230 VAC capacity for installation flexibility.
- Complete 1 YEAR WARRANTY against defects in parts,
materials, and workmanship.
Specifications .
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| CABINET |
2-1/8"H
x 6-1/8"W x 6-3/4"D, brushed aluminum panel, with blue enamel cover. |
| PANEL MOUNTING |
Available
mounted one or two units on a 3-1/2" x 19" brushed aluminum standard
rack panel. |
| POWER |
210-250VAC,
50-60 Hz. |
| FUSE |
3 Amps. |
| CORD |
8' 3
wire with polarized plug. |
| OUTLET |
115 VAC,
3 wire receptacle. |
| SENSOR |
Encapsulated
5/32" O.D. x 3/8" long, on 8' glass sheathed lead wires. Unlimited
lengths are possible by splicing 2 conductor, #22 wire. Sensors will
negotiate 90° curves in 1/4" O.D. x .035" wall tubing with a
radius as small as 1-1/2". |
| SPLASH
SHIELD |
3/8"
O.D. x 1-1/4" long, on SN2 upper sensors & SNTDF sensors. |
ALARM OPTIONS
All
LN2 controller may have an alarm option added to them. There is a
separate sensor added for either the standard alarm option or a valve
operator alarm option. The standard alarm is low level alarm. It is
activated when the sensor is not in liquid. If a "high" alarm is custom
ordered then the alarm indicates when the sensor is in liquid.
- STANDARD ALARM OPTION
When the alarm is activated and the alarm switch is on, you will hear a
buzzer. With the switch turned off, the buzzer is off.
- VALVE OPERATOR ALARM OPTION
The alarm sensor circuitry may also be attach to an 115V outlet that
will activate or deactivate depending on the alarm sensor state. The
option come standard from the factory with the outlet activated when
the alarm sensor is immersed in liquid nitrogen.
CONTROLLER KITS
All
controllers can be supplied in kit form. These kits include the PC
board, sensors, mounting hardware, and wiring instructions.
SENSOR INSTALLATION NOTES
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| Sensors work on the principals of thermal
conductivity. They are internally heated to help differentiate between
the gas and liquid phase of the cryogenic liquid. If they are in liquid
the heat is conducted away. In gas the sensors warm up and are
interpreted by the controller as being out of liquid. When mounting,
the sensor tips MUST NOT come in contact with
thermally conductive materials, such as steel. Also the sensor tips
should not be covered with any material. |
Cryogenic Transfer Line Kits
Complete Kits
| Part Num. |
Description |
| SL-500 |
40 psi, Uninsulated, for pressurized dewars (
Includes: SL-501, SL-503, (3) SL-504, SL-505, SL-506, SL-507, SL-508,
& SLV-40 ) |
| SL-500A |
40 psi, Insulated, for pressurized dewars (
Includes: SL-501, SL-503, (3) SL-504, SL-505, SL-506, SL-507, SL-508,
SL-509, & SLV-40 ) |
| SL-502 |
100 psi, Uninsulated, for pressurized dewars (
Includes: SL-501, SL-503, (3) SL-504, SL-505, SL-506, SL-507, SL-508,
& SLV-100 ) |
| SL-502A |
100 psi, Insulated, for pressurized dewars (
Includes: SL-501, SL-503, (3) SL-504, SL-505, SL-506, SL-507, SL-508,
SL-509, & SLV-100 ) |
Components
| Part Num. |
Description |
| SL-501 |
Dewar Adaptor - 6 1/2" length x 1/2" SAE flare nut
x 1/4" M.P.T. |
| SL-503 |
Tube Adaptor - 1/4" M.P.T. x 3/8" Compression
Fitting |
| SL-504 |
Brass Inserts for Lexan Tubing |
| SL-505 |
43" FlexibleTransfer Line - NYLOFLOW 203, 1/4" I.D.
x 3/8" O.D. |
| SL-505F |
Same as above, but by the foot |
| SL-506 |
3/8" Compression Elbow Fitting |
| SL-507 |
Dewar Nozzle - 10" long, 3/8" O.D., 1/8" F.P.T. |
| SL-508 |
Sintered Brass Splash Arrestor - 2" long with 1/8"
F.P.T. |
| SL-509 |
72" Flexible Foam Insulation - 1/2" Wall thickness
(not flexible at LN2 temperature |
| SLV-40 |
Solenoid Valve - 40 psi , 1/4" orifice with 1/4"
F.P.T., 115VAC @ 60Hz |
| SLV-100 |
Solenoid Valve - 100 psi , 3/16" orifice with 1/4"
F.P.T., 115VAC @ 60Hz |
LN2
Sensor dimensions
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