Use this versatile instrument to continuously measure, display, transmit and control control liquid level in storage tanks or pumping stations, or to monitor and totalize Open Channel Flow through any flume or weir. Mount the non-contacting ultrasonic sensor above the liquid being measured and install the watertight Electronics enclosure nearby. Features a user-friendly keypad calibration system, two digital displays, an isolated 4-20mA output and 3 programmable control relays.

Calibration is easy with the built-in 3 button keypad. The SLT32 offers simple menu selection of measurement units (gallons, liters etc.), calculates volume in horizontal round tanks, or flow rate (and total) through any flume or weir.

For hazardous locations, the ultrasonic sensor is rated Intrinsically Safe with an optional safety barrier. The standard PVC Sensor (optional Teflon) is rated for measurement ranges up to 32 ft/10 m, or use the optional PVC Sensor rated for 50 ft/15.6 m measurement range. Options include 3 additional control relays (6 total) and a built-in 50,000 point Data Logger.

New! Store and Retrieve Flow or Level data with this built-in Data Logger Displays Logs in Graph and Table format with your choice of engineering units Exports data to Spreadsheet or Database programs

Greyline Data Logger Features:

• 50,000 date and time-stamped data point capacity
• Multi session capability - stores up to 10 separate logging "sessions"
• Includes "Greyline Logger" software for Windows™
• Isolated RS232 serial output with selectable baud rates from 1200 to 19,200
• Retrieve Data Logs by modem or by direct PC connection
• Log Flow or Level values from 1 second to 30 minute intervals
• Log reports including Minimum, Maximum, Average and Total in your choice of 1-24 hour intervals

Each Greyline Instrument with built-in Data Logger includes an isolated RS232 serial output, terminal connections, cable and adapters. Connect directly to the serial port on your PC or Laptop, or by dial-up connection through modems and phone lines.

Run the Greyline Logger software program to retrieve and display data logs on your computer. Display multiple files or "sessions" in both graph and table formats. Log files can be exported in graphic file formats or as delimited text files for use in spreadsheet or database programs.

Greyline Logger software runs on any PC with Windows 95, 98 or NT.

How It Works....

Ultrasonic Level Greyline ultrasonic sensors are mounted at the top of a tank or in a position above the liquid being measured. The sensor continuously transmits pulses of high frequency sound (typically 42 kHz) which travel away from the sensor, hit the surface of the liquid and return to the sensor.

The instrument electronics measure the time it takes from transmitted sound to return of the echo. With reference to the speed of sound in air, the exact distance of the liquid surface from the sensor can be calculated with high accuracy (±0.25% of maximum range). Since the speed of sound is affected by air temperature, Greyline ultrasonic level sensors include a built-in temperature sensor. Level/distance measurements are automatically temperature compensated throughout the operating temperature range of the sensor. The sensor should be positioned so that it has an clear "view" of the liquid surface and away from ladders, pipes or other obstructions. Greyline recommends 1 ft. from the sidewall for every 10 ft. depth (300 mm for every 3 m depth). False echoes from agitators (sweeping under the sensor), turbulence and waves can be filtered and disregarded by the instrument. Greyline models range from simple 4-20mA level indicating transmitters, to sophisticated monitoring, controlling and logging models.

Standard features include:

LEVEL + FLOW MONITOR SPECIFICATIONS

SCOPE: This specification covers a non-contacting ultrasonic Level/Flow Monitor as manufactured by Greyline Instruments, Massena New York / Long Sault, Ontario. This instrument shall provide for indicating, transmitting and control of the material level in a vessel or proximity of a target to the instrument sensor, and indicating, transmitting, and totalizing of the flow rate through a flume, weir, or other primary measuring device.

A. GENERAL

B. SENSING ELEMENT

C. SENSOR CONNECTING CABLE

D. TRANSMITTER

E. OPTIONAL FEATURES FOR INSERTION AS REQUIRED

F. MANUFACTURER

Level/Flow Monitor shall be Model SLT32 as manufactured by Greyline Instruments Inc. and shall be warranted against defects in materials and workmanship for one year.