Liquid and Oil Level Probes0 pages

LIQUID AND OIL LEVEL PROBES
The function of a Liquid Level Probe is to measure and display
refrigerant or oil level in a vessel.
Applications
Henry Technologies' Liquid Level Probes are designed for use in a variety of
refrigeration and air conditioning applications. The Liquid Level Probes use
a 1-1/4”-12 Rotalock fitting to mount to Liquid Receivers or Oil Reservoirs
and provide a 0-5V output of fluid level. Probes are custom ordered based
on specific application and desired features.
Henry Technologies' Liquid Level Probes are suitable for use with HFC and
HCFC refrigerants, as well as their associated oils. Each Probe should be
ordered based on specific application to ensure proper calibration.

Main Features
Ÿ
1-1/4”-12 Rotalock connection
Ÿ
Continuous accurate measurement
Ÿ
Watertight cable connector
Ÿ
Optional Accessories* Including:

3-wire or 6-wire 20AWG cable
LCD Display
¡Low level alarm relay
¡Stand tube
¡Remote probe head
¡0-5V, 1-6V or 4-20mA output
¡

¡

How it Works
The Liquid Level Probe measures refrigerant or oil level by sensing a change
in capacitance between the LLP probe rod and the receiver/reservoir wall.
As the fluid changes in level, the output voltage changes between 0 and 5
volts. For example, at the 0% set level the output would read 0V, at the 50%
set level the output would read 2.5V, and at the 100% mark (Typically set at
90% of vessel capacity) the output would read 5V. All Liquid Level Probes
come factory calibrated based on the order specification but are easily
recalibrated in the field if needed.

Technical Specifications
Maximum working pressure = 1000 PSI (68.9 Bar)
Allowable ambient temperature = -40°F to +158°F (-40°C to +70°C)
Supply Voltage = 12-32 VDC
Maximum Load = up to 2 K ohms with less than a 5% shift

Œ

Ž

3-Wire or 6-Wire Cable
Watertight Cable Connector
Backlit LCD Display
1-1/4” - 12 Rotalock Connection
Stand Tube and Probe Rod

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Henry Technologies' Liquid Level Probes are CE marked in accordance with
PED.
*Please contact Henry Technologies' Sales Department at 1-800-964-3679
for custom applications.

B

Materials of Construction
The probe rod is made of stainless steel and the stand tube is made of
aluminum. The Rotalock connection is made of plated steel, and the probe
head is cast aluminum.

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Installation - Notes
1. Liquid Level Probes are factory calibrated based on order
specifications.
2. Re-calibration procedure and wiring diagrams are included with the full
instructions given in the Product Instruction Sheet, included with each
unit.

A

LIQUID MANAGEMENT

Part No

89

LLP Series

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Rotalock
(inch)
1-1/4” -12

Dimensions (inch)
A
B
10-60
7.75

Approximate
Weight (lbs)
2.5