Open Channel Flow & Tank Level Meter OCF 6.1

Open Channel Flow & Tank Level Meter OCF 6.1

• Safe, Non-Contact Measurement
• Simple 5-key Configuration
• 4-20mA/0-5V Output
• 26-Million Point Data Logger
• On-Screen Flow Reports
• Password Protected
• Modbus® RTU Optional

  • Description
  • Specifications
  • Brochure
  • User’s Guide

Product Description

Easy to Install and Calibrate. Simple, Accurate and Reliable.

Non-Contacting Sensor
The OCF 6.1 uses a non-contacting ultrasonic sensor mounted over a flume or weir to measure flow, or inside/above a tank to measure level. It is accurate, reliable, and verifiable. The separate,
watertight electronics/display enclosure can be mounted within 500 ft (150 m) of the sensor. The OCF 6.1 continuously displays, totalizes, transmits, and data logs open channel flow or level.

Keypad Operating System
Use the built-in keypad for fast, easy configuration with menu selection of flume or weir and measurement units (e.g. gallons, liters, etc.) Configuration settings and data logs are password
protected and retained during power interruptions. The OCF 6.1 will display on-screen flow or level reports with daily total, minimum, maximum, and average flow/level and will transfer
data logs to a USB flash drive. PC software for easy report generation is included.

26-Million Point Data Logger
The OCF 6.1 stores time and date-stamped flow values at programmable intervals of 10 seconds to 60 minutes. Daily reports are automatically created and can be viewed right
on the instrument’s LCD display including total, minimum, maximum, and average flow rate or levels. Daily reports can also be downloaded easily to a USB drive in .csv format.

You don’t need a laptop to retrieve log files! Plug any USB Flash Drive into the OCF 6.1
USB output to download data log files automatically. Downloaded files are sequentially
named by the meter, so log files from the same or multiple instruments can be stored
on one flash drive.

Greyline Logger Software for Windows®
Greyline Logger is included with each OCF 6.1. This powerful software
displays data in both graph and table formats. You can view flow and
level data onscreen, generate reports, and save files to disk . Graphs can
be exported as images and data tables can be exported as delimited text

files, or directly to Microsoft Excel®.
• Display, analyze, and export log files in graph and table formats
• Generate reports including totalizer, minimum, maximum, and
average flow rates and level
• Convert measurement units
• One-click export to Microsoft Excel®

Electronics Enclosure: Watertight and dust tight NEMA4X (IP 66) polycarbonate with clear, shatterproof cover
Accuracy: ±0.25% of measured range or 0.08” (2 mm) whichever is greater, Repeatability and Linearity: ±0.1%
Display: White, backlit matrix - displays flow rate, totalizer, relay status, operating mode, and calibration menu
Programming: built-in 5-key configurator with English, French or Spanish language selection
Power Input: 100-240 VAC 50-60 Hz (see Options), 10 VA max depending on options
Output: Isolated 4-20 mA/0-5 V, 1000 ohm load maximum, programmable offset
Control Relays: 2 Relays, form ‘C’ dry contacts rated 5 amp SPDT; programmable level alarm, pump control, pump alternation, failsafe/
echo-loss, air temperature alarm
Electrical Surge Protection: Sensor, 4-20 mA and AC power input
Data Logger: Built-in 26-million point data logger with USB output and Windows® software.
Operating Temperature (Electronics): -5° to 140°F (-20° to 60°C)
Approximate Shipping Weight: 10 lbs (4.5 kg)
Approvals CE, cCSAus

Maximum Range: 15 ft (4.57 m) with standard PZ15 sensor 32 ft (10 m) with standard PZ32T sensor
Deadband (Blanking): 
Programmable, Minimum 8 in (203.2 mm)
Beam Angle: 

Operating Frequency: 
PZ15: 92 kHz; PZ32T: 42 kHz
Exposed Materials: PZ15:
 PVC; PZ32T: PVC and Teflon
Operating Temperature:
 -40° to 150°F (-40° to 65°C) with automatic temperature compensation
Submersion Rating:
 Protected for accidental submersion to 10 ft (3 m) maximum
Sensor Cable: 
RG62AU coaxial, 25 ft (7.6 m) standard length (See Options)

Industrial Automation Protocols: Modbus RTU via RS-485
Sensor Cable: 15 m continuous or 30 m continuous RG62AU coaxial from Sensor, or splice up to 150 m with Junction Box
Intrinsic Safety Barriers: For Sensor mounting in Class I,II,III, Div. I,II, Groups C,D,E,F,G hazardous locations
Power Input: 9-32 VDC, 10 Watts max
Control Relays: 4 additional (6 total), rated 5 amp SPDT
Enclosure Heater: Thermostatically controlled - recommended for temperatures below 32°F (0°C)
Sunscreens: Sensor sunscreen and enclosure sunscreen for outdoor installations
Sensor Mounting Stand: Adjustable, includes galvanized steel pipe, flanges, fittings and hardware