Introduction

Judd Communications LLC is consulting firm based in Salt Lake City, Utah. We offer products and services for remote environmental monitoring. Our main products are the Ultrasonic Depth Sensor and the Datalogger Display

Judd Communications LLC

2248 E. Lauri Kay Drive
Salt Lake City, Utah 84124 USA

Voice: (801)424-2889 Fax: (801)424-1528


E-Mail: dan@juddcom.com

Ultrasonic Depth Sensor

View ANALOG Output manual as PDF file
Download ANALOG Ouptut Sample Program for theCampbell Scientific CR10X Datalogger CSI file DLD file
Download ANALOG Ouptut Sample Program for the Campbell Scientific CR1000 Datalogger CR1 file

View DIGITAL Output manual as PDF file
Download DIGITAL Ouptut Sample Program for the Campbell Scientific CR10X DataloggerCSI file DLD file
Download DIGITAL Ouptut Sample Program for the Campbell Scientific CR1000 DataloggerCR1 file

Transducer Replacement Instructions

The Judd Communications ultrasonic depth sensor is an inexpensive solution for remotely measuring snow depth or water levels. The sensor works by measuring the time required for an ultrasonic pulse to travel to and from a target surface. An integrated temperature probe with solar radiation shield, provides an air temperature measurement for properly compensating the distance measured. An embedded microcontroller calculates a temperature compensated distance and performs an error checking routine.

Both distance and air temperature are output as an analog signal between 0 to 2.5 Volts or 0 to 5 Volts. Measurements can also be output digitally as serial ASCII. Specify Analog or Digital output at time order.

Due to the simplified interface, the depth sensor can interface with any datalogger or control system that can delay at least 3 seconds after powering up before measuring the output.

Specifications

Power: +12 to 24 VDC, 50 mA (maximum sample time 2.6 seconds)

Analog Output: 0 to 2.5 or 0 to 5 VDC

Digital Output: 1200 baud serial ASCII

Range: .5 to 10 meters (1.6 to 32.8 feet)

Beamwidth: 22 degrees

Accuracy: 1 cm or .4 % distance to target

Resolution: 3 mm ( .12 inches)

Temp. range: -40 to + 70C ( -40 to 158F)

Size: 8 x 8 x 13 cm (3 x 3 x 5 inches)

Weight: .6 kg (1.3 lbs.)

Mounting: 1/2 inch galvanized threaded pipe

Cable length: 7.6 meters (25 feet)

Max. cable length: 304 meters (1000 feet) for Analog output, 76 meters (250 feet) for Digital output

Temperature Sensor Specifications

Accuracy: 1C, -40 to +85C

Resolution: .5C

Price $652 US (shipping extra)

Datalogger Displays

LCD1

View manual as PDF file

Download Sample Program for the Campbell Scientific CR10X DataloggerCSI file DLD file
Download Sample Program for the Campbell Scientific CR1000 DataloggerCR1 file
 
Introduction
The Judd Communications Datalogger Display is a 2 line by 40 character display that can be connected to any datalogger capable of outputting ASCII text. The Datalogger Display is small terminal that monitors a 1200 baud data line and displays the output. The Datalogger Display is primarily intended to be used as a local display, located within 250 feet of a datalogger.

Operation
The Datalogger Display is powered by  +12 Volts. Power can usually be taken directly from the datalogger power supply. Data to be displayed is received at 1200 baud(8-N-1). The display can be configured to decode either normal or inverted serial data. The data input levels can be either RS-232 or 0 to 5 Volt.  All ASCII characters can be displayed. The 01 ASCII character (control A) can be used to clear the display.  The 02 ASCII character (control B) can be used to move the cursor to the beginning of the second line. Up to 80 characters can be displayed.
Options

  •  Backlighting, Electroluminescent (draws an additional 28 ma)
  •  Custom cable lengths, Custom cabling
  •  Display and interface circuitry without case for custom applications
  •  Extended operating temperature range, -4 to 122 ?F ( -20 to 50 ?C)

Specifications
Power: +12 Volts, 4 ma
Data Input: 1200 baud, 8-N-1, RS-232 or 0 to 5 Volt
Temp Range: 32 to 122 ?F (0 to 50 ?C)
Size: 8 x 1.75 x 1.75 inches (195 x 40 x 40 mm)
Weight: .5 lbs. (.23 kg)
Cable Length: 5 feet (1.52 meters)
Max. Cable Length: 250 feet (76 meters)
Case: Wood or Acrylic

Price  $298 (U.S.)