Redpost RPU-352 and Frame
Redpost RPU-352
  • Two temperature channels
  • Storage for multiple recording runs
  • Back-lit LCD
  • 4 hour run time
  • Real-time clock
  • On-screen PU results
See also: RPU-120+ RPU-353


Third generation technology offers industry-leading accuracy. The RPU-300 series replaces the successful RPU-200 series of PU monitors.

The RPU-352 is a special purpose electronic temperature recorder designed to monitor the tunnel pasteurisation process. It has inputs for two temperature probes so that the conditions inside and outside the package can be measured at the same time.

The instrument passes through the pasteuriser with the product and after the run the PU value achieved, together with several other important results, is calculated automatically. Standard results calculated are: total PUs achieved, time accumulating PUs, time in holding zone, maximum values of all channels etc. All sensor readings are shown continuously allowing the unit to be used as a thermometer.

Redpost's latest series of monitors prevents product spoilage by calculating the temperature of the product when it leaves the pasteuriser, this exit temperature is shown with the other results.

Results are displayed on the instrument allowing immediate confirmation of correct pasteurisation, the display can show graphs and lists of recorded data, data can be displayed in a choice of units. The conditions during several runs can be recorded and examined before the data is printed or transferred, this allows end-to-end working without returning to the laboratory.

The RPU-352 is compatible with Redpost's popular RPC-80 and RPC-50 printer/chargers. With these, reports can be printed or the data can be transferred to a computer for storage and further analysis.

The controls are simple and the display shows operating prompts and results in a choice of languages and engineering units. Many functions of the equipment can be configured to suit particular requirements. All settings are protected to prevent operators making accidental changes to the configured settings.

A service reminder gives the operator a notification when a service should be considered. Calibration details can be held in the instrument to aid record keeping for ISO 9000.

Redpost PU recorders are offered with a range of temperature probes for both bottles and cans, spray water temperature probes, mounting frames, and test plugs for on-site checking of calibration. Instruments and probes are calibrated at time of manufacture against standards traceable to U.K National Standards.

Temperature Channels 1 2 2
Pressure Channel     X 
Real-time clock   X  X 
Non-volatile Storage   X  X 
Temperature Units °C °C or °F °C or °F
Recording Interval (s) 10 2-60 2-60
Service Reminder X  X  X 
Max. Time (h) 4 9 9
Max. Run Time (h) 4 42 42
Max. Files 1 43 43
Standby Mode   X  X 
Min. Temp. -5°C -5°C -5°C
Max. Temp. 105°C 105°C 105°C
Min. Operating Temp. 0°C 0°C 0°C
Max. Operating Temp. 85°C 85°C 85°C
Accuracy 0.25°C1 0.25°C1 0.25°C1
Resolution 0.01°C 0.01°C 0.01°C
English X  X  X 
French X  X  X 
German X  X  X 
Spanish X  X  X 
Russian X  X  X 
Compatible with RPC-40 X     
Compatible with RPC-42 X     
Compatible with RPC-44 X     
Compatible with RPC-50 X  X  X 
Compatible with RPC-80 X  X  X 
Pressure Units     bar (g), psi, kg/cm²
Min. Pressure.     0 bar(g)
Max. Pressure.     10 bar (g)

1 Worst case for bottle/can probe including errors over temperature, long term drift and initial errors
2 Can be special ordered with 1-9 hours run time
3 Can be special ordered with 1-6 maximum files