KOIZUMI Digital Planimeter
Placom N-Series

Newest Model of "PLACOM" N-Series have made the excitingly highest attainement in the history of Planimeters ever made.
Measuring capacity is remarkably enlarged.
Measurement by 6-digit pulse count enables to measure 100 times larger accumulative area than ordinary planimeters.
Easy calculations of Cumulative and Mean Value Measurement.
Conversion of Unit and Scale value is made by easy operations.
"WONDER", it is a most worthy word to be given to this "PLACOM" N-Series.

Special Features of PLACOM N-Series :

Measurement by 6-digit pulse count
This N-Series measures the area by pulse count of 6-digit. This method enables a larger cumulative measurement of area (up to 10m²).

Maximum Cumulative Measurement Value of 10m².
With the measurement by 6-digit pulse count, the N-Series Planimeter can measure a larger area by 100 times than ordinary planimeter.
The conventional planimeter has a maximum cumulative area to measure only 0.1 m². So, in measurement, at every measurement value of 0.1m², the display is to be reset to 0. This reqires to register the numbers of how many times these resetting are occurred.
With the New PLACOM N-Series, there is no need of these troublesome procedures.

Function of Easy Conversion of the Value of Unit and Scale.
IP-900N and KP-800N can convert easily the measured area value into a new area value in a newly desired unit and with a newly desired scale value.
KP-92N and KP-80N can convert the unit between in² and cm².

Hold Memory Function
In Cumulative Measurement, this Hold Memory function is effectively used.
If an error occurs in measuring No. "N" th area, press C/AC key. Then the pulse count value measured up to "N-1" th appears. No need of another measurements from the lst area to "N-1"th area again.

Automatic shifting of Unit to upper Unit
When the measured area value overflows the displayed figures of 8 digits, the measured area value is calculated and displayed by an upper unit. When the overflows is occurred in the uppermost unit, km², acre, the measurement can be continued by pulse count display.

Mean (Average) Value Measurement.
In order to get better result of measurement, Mean Value Measurement is recommended. This measurement can be easily done on this N-Series.
Measurement of an Area with different lateral and longitudinal scale.

DC or AC power supply is available.
Auto-Power-Off function for energy saving.


Specification and Standard
Model KP-90N KP-92N KP-80N KP-82N

Roller Type

Polar Type

With computing function Single function With computing function Single function
Display Liquid Crystal, 8-digit figures
10 symbols 5 symbols 10 symbols 5 symbols
Symbol Batt-E, SCALE, MEMO, HOLD
Converting Function

Unit and scale value

Unit (in²,cm²)

Unit and scale value Unit (in²,cm²)
Accumulated Measuring Value

Maximum 1m² ( scale 1:1)

Measuring Range •Maximum vartical width: 325mm
•Horizontal roller rotating length: 30m
•Maximum, with the pole put outside the pattern: 300Ømm
•Maximum, with the pole put inside the pattern: 800Ømm

Within ± 0.2% (within ± 2/1,000 pulses)

Power Supply 1. Built-in NiCd Storage Battery (rechargeable through AC Adapter
2. AC100V 120V, 220V and 240V, (using the supplied AC Adapter)
(Provided with auto power-off function)
Operating Duration

Approx. 30 hours of continuous operation

Battery Charging Time

Approx. 15 hours

Main Unit Weight 750g 750g 780g 780g
Accessories Supplied AC Adapter and Plastic Case