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T&D Wireless Logging

T & D Wireless Systems are best configured by consulting with us. Individual components are not available for Internet purchase separately. We will provide excellent, competitive pricing for a complete system: 704-827-4331

No sense in waiting any longer to tap into the benefits of a wireless system for your monitoring requirement. T&D offers a clear advantage in the technology of wireless loggers, and Global Sensors can supply you immediately with a reliable and high-quality system configured using their excellent components. T&D wireless capability ranges from standard air temperature monitoring, external probe monitoring (good for dry ice shipments and certain deep-frozen operations), external probe humidity monitoring, and just about any type of other sensor or measurement application.

The advantages of wireless are pretty dramatic: get results instantly without touching the logger, remote reprogramming of logger settings, and data collection of multiple logger data sets in a handheld unit. The days of standard data loggers for busy transit applications are numbered. To get started, you need a Data Collector, at least one logger, and software.

Call us if you intend to set up an extensive system, or just order the hardware components you need to set up your own initial system.

The T & D Data Collector

The T & D Data Collector is the heart of the T & D system. The RTR-57C gives you a high quality graphic display of collected data. Each LCD screen plotted graph displays the data for one channel and can be easily scrolled across by using the handy operation dial or the buttons on the front of the main unit.

The RTR-57C captures data from any of the remote logger units and gives you the data you want in an easy-to-understand format–it eliminates the need for a PC for quick monitoring and reproduces the function of graphic paper recorders. The illustration at right shows the graphical capabilities of the RTR-57C: When there are two channels of data, you can switch channels by pushing in the operation dial for 1.5 seconds.

By making upper and lower limit settings on the RTR-57C you can check the recorded data as it is collected for irregularities and the results will be displayed. If an RTR-51,52,53 or RVR-52 unit has already been set with its own upper and lower limits, those values will take precedence over the values set in the RTR-57C.

The data capacity for the RTR-57C is 260,000 readings. That is a large enough capacity to collect data from 16 units of RTR-51,52,53 or RVR-52 at full capacity (16,000 readings). It can also collect and process up to 250 data recording sessions.

Besides controlling the collection of data, the RTR-57C can manage various recording settings such as: Recording Mode, Recording Interval, Programmed Recording Settings and Immediate Record. This enables the user to easily control various recording settings for a variety of models on-site without the need for a computer. When battery life goes low, the RTR-57C backup function first displays a battery life warning and then goes into automatic sleep mode. Thereby, the main unit cannot be turned on and all data will be safely stored without loss.

The RTR-57C takes advantage of our exclusive circuitry design to bring over 100 operating hours worth of power on only 2 AAA alkaline batteries (in normal usage). Energy efficiency is further enhanced with our Auto Power Off Function that turns off the main unit when not in use. Moreover, the ergonomic design permits day long usage without fatigue.

T & D Wireless Loggers

T&D wireless loggers consist of four basic models: temperature with an internal sensor (RTR-51), temperature with an external sensor (RTR-52), humidity with an external sensor (RTR-53) and voltage model (RVR-52) which can be used with a voltage-producing sensor of the user’s choice. The RTR-51,52,53 and RVR-52 give you 15 recording intervals (1 second to 1 hour) to choose from. Each unit allows you two choices of recording method: One time method when 16,000 readings have been reached, it automatically overwrites oldest data. One RTR-51 or RTR-52 unit can record up to 16,000 readings.

If set at a one hour recording interval that gives you 666 days or almost two years of recording. Using our specially designed low energy consumption circuit these units can run on one lithium battery for up to six months of continued use. In addition, by using our specially designed optional large capacity battery pack, the unit can used continuously for up to two and a half years. No need to worry about where you place it, as the battery will allow you to measure and record over long periods of time whether the unit is in transit or in a distant place.

RTR-51/51L Internal Sensor Logger

The RTR-51, with internal sensor, can measure and record temperatures from -40°F to 176°F (-40°C to 80°C). Use the RTR-51 for normal air temperature monitoring in transit applications, or for cold room. chiller or refrigerator monitoring where there is no interference with radio frequency communication with the data collector. The unit is easily mountable and with a battery pack that is user-serviceable. The RTR-51 has options for a long life battery pack capable of extending recording to well over two years.

RTR-52/52L External Sensor Logger

The RTR-52, with external sensor, is able to measure and record in a range of -76°F to 311°F (-60°C to 155°C). Use the RTR-52 for extreme temperature monitoring (autoclave, cooking, steamer, dry-ice storage, smokehouse or other extreme condition. Use the RTR-52 for applications where the sensor location is such that wireless communication is hindered by metallic walls (place unit outside the wall and sensor lead inside the walls. The external sensor is at the end of a heat and cold resistant lead wire approximately 2 feet in length (0.6m). The unit is easily mountable and with a battery pack that is user-serviceable. The RTR-51 has options for a long life battery pack capable of extending recording to well over two years.

RTR-53/53L External Humidity Probe Logger

RTR-53 is a combined temperature logger and humidity logger. The remote probe allows the monitoring of confined spaces where there is no possibility for mounting of a logger unit. Deployment of the humidity sensor on a removable probe lead is beneficial, as humidity probes have a limited service life, and users can keep a spare in stock when the sensor needs replacement or recalibration. The external sensor is at the end of a heat and cold resistant lead wire 3 feet in length (3m). The unit is easily mountable and with a battery pack that is user-serviceable. The RTR-51 has options for a long life battery pack capable of extending recording to well over two years. Be sure to inquire about our humidity calibration programs.

RVR-52/52L Voltage Logger

RVR-52 measures and records input voltages from 0 to 6.5VDC. You can choose to record the voltage measurement as the instantaneous value for each recording interval span or as the average value for each recording interval span. The average value for recording intervals under 15 seconds will be calculated as the average of the measurements from every 1 second. The average for intervals over 20 seconds will be calculated as the average of the measurements from every 2 seconds. The RVR-52 data collection capability represents an important signal conditioning function that improves accuracy and data significance:

Sophisticated signal conditioning is built in to this logger model. Using the “equal interval” timed method is the simplest approach, and is best for determination of trends in the data.

Using the “average value” method is the simplest approach, and is best for smoothing of data where noise input is significant. RVR-52 can also be used with data producing devices that output in pulses (wind speed generators, for example) or can simply be used as an event marker (opening and closing of refrigerator doors, for example). We can supply additional technical details, or just download the product sheet for technical information.

General Specifications

Specification / Model RTR-51/51L RTR-52/52L RTR-53/53L RVR-52A/52AL
Measurement Channel Temperature Channel Temperature Channel Temp and Humidity Channel
  • Voltage Channel
  • Pulse Channel
  • Event Channel
Internal Temp. Sensor -40°C to +80°C
External Temp. Sensor (-60°C to +155°C) (0°C to +55°C)
External Humidity Sensor 10 to 95% RH
Input Voltage Range
  • Voltage: 0 to 6.5V
  • Pulse: 0 to 30V
  • Event: 0 to 30V
Measurement Display Resolution 0.1°F or °C 0.1°F or °C 1°C/1%RH
  • Voltage: 1mV
  • Event: 1 second
Measurement Accuracy Average
At -20°C to +80°C(-20°C to +80°C):Average ±0.5°F (±0.3°C)
****At -40°F to -4°F and
+176°F to +230°F
(-40°C to -20°C and
+80°C to +110°C):
Average ±0.9°F
****At -76°F to -40°F and
+230°F to +311°F
(-60°C to -40°C and
+110°C to +155°C:
Average ±1.9°F
At 25% and 50%RH:
(at 0 to 40)
Detection Voltage Lo: below 0.6V /
Hi: above 2V
Response Time Pulse:30Hz / Approx.15msec or more (over 2.5V)
Event: 1 sec.
Response Polarity Pulse:
Select Lo-Hi or
Both Lo -Hi and
Highest No. of Counts Pulse:
Vo: Approx, 1M
Pulse, Event: Pull-up Resistor
Approx. 100K
Recording Interval 1,2,5,10,15,20,30 seconds / 1,2,5,10,15,20,30,60 minutes
Total of 15 choices (Excluding Event data)
Recording Capacity 16,000 Readings x 1 Channel 8,000
Readings x
2 Channel
Voltage Pulses/16,000 Readings
x 1 Channel
Events/ 8,000 Readings
x 1 Channel
Recording Mode Endless (Overwrite oldest data when capacity is full) /
One-time (Stop recording when capacity is full)
LCD Display Items Current Readings / Recording Settings / Battery Life Warning /
Over Measurement Range Warning / Amount of Recorded Data
Power One Lithium Battery (LS14250(SAFT)) or AC Adaptor (sold separately)
Battery Life Approximately 6 months under normal conditions
Wireless Method FCC Part 15 Section 249 / IC RSS-210
Dimensions H 2.44in (62mm) x W 1.85in (47mm) x D 0.75in (19mm)
(excluding protrusions / antenna length 0.79in [20mm])
Communication Speed When downloading data (Wireless) about 2,000 readings per minute
[Collection of a full unit of data = about 420 seconds
Water Resistance IP67
(immersion proof)
IP64 (rated for use in daily life)
Standard Sensor (Length Input Cable) TR-5106
2 ft (0.6m)
3 ft (1m)
5.5 ft (1.5m)
Ambient Temperature Operating Limit (Logger Unit) -40°F to +176°F (-40°C to +80°C)

T & D Software

T&D Recorder for Windows is a free software package for purchasers of matching T & D recorder products.
Upon opening T & D Recorder, the launcher will appear as a set of icons. By clicking on an icon, the graph and / or communication displays for that type of unit will appear. For each icon, it is possible to change the settings to hide or show that icon, making it possible to hide unnecessary icons. It is also possible to display the icons in the main window in a smaller reduced size.

When in reduced size, besides clicking on an icon to open a graph or a communication display for that type of unit, right clicking will open a menu. It is also possible to move the icons by dragging the launcher to a different place on the screen.

Download T&D Recorder Software [5.58 Mb]

Software Specifications
Software Title T&D Recorder for Windows (TR-5,7xU)
Compatibility This software has been specifically designed for use only with TR-57U, TR-51S/52S, TR-51A/ TR-52 and TR-71U/72U/73U/77Ui, allowing you to control all settings, data downloading and graph creation, as well as other functions.
Works with these units
  • TR-5S Series
  • TR-5 Series
  • TR-7U Series
  • TR-77Ui
  • TR-57U
  • TR-50U
  • TR-50C
Version 1.70
Version Date 1/27/2010
Compatible Operating Systems
  • Microsoft Windows 2000(SP3 or above) English
  • Microsoft Windows XP(SP1 or above) English
  • Microsoft Windows Vista English
  • Microsoft Windows 7 English
Minimum Hard Disk Space More than 20 MB of free space (Data will need more space)

T & D Sensor Networks

We have configured many T&D logger-sensor networks. These systems work on the basis of remote logging and sensing units connected to a central data collection monitor. The systems consists of a network of individual temperature, humidity or sensor/voltage loggers at specific locations.

The basic logger units are are combined with our unique RTR-57C Data Collector working in combination with a PC computer. The Data Collector can be used alone or in combination with the PC for monitoring critical limits and/or collecting data for trend analysis, alarm purposes or other monitoring functions.

The heart of the system is the RTR-57C Data Collector (shown in the middle, above). Individual loggers can be queried by groups (as indicated above), and up to 3,840 units can be registered to report to a single RTR-57C Data Collector unit. The RTR-57C is connected to a PC computer that can be used to subsequently store and further process data collected from individual units.

The benefits of this system compared to standard sensor networks are numerous:

Function T&D System Other Types of Sensor Networks
Data Security Each sensing location is a logger, so a separate backup of data is assured. Sensor locations have no recording function, so data collection failures mean no backup.
Sensor Flexibility Logger sensor types can be humidity, temperature or any sensor type that can produce a voltage output. Pulse and events can also be recorded. So, users can choose from thousands of inputs. Sensor types are limited in most systems and are custom fabricated.
Communication Integrity If communications interruption occurs, data is safe. Communication interruptions mean lost data.
Programming Flexibility Each location can be programmed to have different recording intervals and upper and lower ranges. Non-logging sensors are not programmable.
System Cost System can be purchased and integrated by user; no system installation costs are charged, just individual hardware purchases. Software is flexible and free. System cost embeds installation and integration charges in addition to hardware and software costs.
System Maintenance Battery packs allow unattended monitoring for 2.5 years at each logger location and can be remotely checked. Monitoring locations are user-serviceable by standard replacements. Sensor locations do not indicate battery problems and are usually custom integrated and calibrated. This requires an expensive service call to the system integrator.

One convenient way to set up a system is to have groups that are designated by frequency of monitoring. Critical functions can be grouped so that they are monitored on a frequent basis; other, more routine functions can be monitored for trends on a daily, weekly or monthly basis. Call us to discuss how to set up your system. We provide expertise to advise you on setting up these systems, but never charge for system setup or integration. We sell system components and provide support for software and hardware.

Questions and Answers About Wireless Networks Using T & D Loggers

What’s A Sensor Network?
Sensor networks are systems of sensors like temperature, event counters (opening and closing of doors) and other important data collection functions. Each of the sensor locations is connected by radio frequency (wireless) to a central computer that stores the data. Most sensor networks have alert functions that will call you on the phone, operate a pager, send you an email message, or set off an alarm if critical preset alarm thresholds have been exceeded, or if the data in any definable way indicates a problem.

Can I Install it Myself?
It depends. Our T&D systems are generally user-installable. Some of our other sensor networks are too complicated for users to install. Please call for details.

What about HACCP?
A sensor network is the ideal way to automate your HACCP program for retail food operations and processing. Go paperless, wireless and save a lot of money while conforming to all of your HACCP requirements. Governmental authorities in the U.S. will soon be implementing HACCP requirements for retail food establishments. The only clear and cost-effective way to deal with the requirements of retail HACCP is a sensor network. Find out how you can be prepared for this coming requirement.

Can I put a sensor inside a metal-lined cooler or walk–in?
Yes. You can place the sensor anywhere inside a reach–in or walk–in cooler, or any other type of equipment, shut the door and the temperature data will transmit out.

Is there a limit to the size of a facility or the number of temperature points?
No. Using the reader, you can collect data from a very large number of data collection point…more than any one facility will be using.

Do I need to calibrate the T & D loggers on a regular basis?
The need for re–calibration depends on your application. If you are a foodservice or processing operation, your HACCP may only require your in-house accuracy validation. A laboratory may require an annual calibration certificate, which we can supply. If an annual certificate is required, then we can provide special sensors where only the probes can be easily replaced so that the re-calibration job is quick and simple.

We plan on moving in the next few months or a year. How difficult is it to move the system?
Remember, it’s wireless! Just collect all the sensors, unplug the receiver and repeaters and take them to your new location. Re-install at the new location, and the system is back in operation. If you need more sensors, you can add as many sensors as you need in the same system.