Official Product by NaRiKa

Educational Equipment · Comprehensive Tester

Science Multimeter DIGI‑MARU · DOC‑01

NaRiKa Comprehensive Tester (Oxygen & Carbon‑Dioxide Monitor, Ken‑chan α) is specially designed for biology teaching experiments in junior and senior high schools. It can quantitatively detect oxygen and carbon‑dioxide concentrations simultaneously, fully supporting core biological experiments such as respiration and photosynthesis. It is an ideal measuring tool for teacher classroom demonstrations and group‑based student experiments.

O₂+CO₂

Dual‑parameter Detection

90mm

Compact Body

80g

Lightweight & Portable

Simultaneously measures oxygen and carbon‑dioxide concentrations for quantitative experiments on respiration and photosynthesis

Designed for junior and senior high‑school biology courses with intuitive data and simple operation, suitable for classroom demonstrations and student group experiments

Light‑weight body of approx. 80g and compact dimension 90×25×72 mm, easy to hold in one hand and carry around

Housing made of ABS engineering plastic, drop‑resistant and durable for frequent use in teaching scenarios

Product Specifications

Brand	NaRiKa	Product Name	Comprehensive Tester / Science Multimeter DIGI‑MARU
Product Category	Digital Measuring Instrument	Model No.	DOC‑01 (Ken‑chan α)
Main Material	ABS Engineering Plastic	Product Dimensions	Approx. 90×25×72 mm (Length × Width × Depth)
Net Weight	Approx. 80g (Battery Not Included)	Measured Objects	Oxygen Concentration / Carbon‑Dioxide Concentration
Application Scenarios	Full‑set quantitative experiments on respiration and photosynthesis	Target Users	Junior & Senior High‑school Students, Biology Teaching Experiments
Power Supply	Battery‑powered

Packing List

Comprehensive Tester Host × 1, User Manual × 1

Core Features

Dual‑parameter Detection

Simultaneously detects oxygen(O₂) and carbon‑dioxide(CO₂) concentrations. One unit meets experiment requirements of respiration and photosynthesis

Dedicated for Biology Experiments

Designed for core biology experiments in junior and senior high schools, delivering stable data for classroom quantitative analysis

Clear Digital Display

Large‑size DIGI‑MARU LCD screen with clearly readable values for instant experiment results

Lightweight & Portable

Net weight approx.80g and compact 90‑mm body, one‑hand operation, convenient for lab table and outdoor carrying

One‑button Operation

Simplified button layout for easy power‑on and mode switching, lowering operation barriers for students

High‑precision Sensor

Stable sensing component with fast response, delivering reliable data support for teaching experiments

Durable ABS Housing

ABS engineering‑plastic shell, drop‑proof and wear‑resistant for high‑frequency teaching use

Made by NaRiKa, Japan

Product from Japanese educational‑instrument brand NaRiKa, reliable quality and well‑received in education sector

Important Notes

Please make sure batteries are installed with correct polarity before use. Brand‑new alkaline batteries are recommended
Keep the sensor window clean during measurement. Dust or liquid coverage may impair testing accuracy
Power off the instrument promptly after experiments to extend battery service‑life
Do not submerge the device in water or expose it to high‑humidity environment to avoid internal‑circuit damage
Remove batteries for long‑term storage and keep the unit in a dry and well‑ventilated place
Suitable for classroom demonstrations and group‑based biology experiments of junior and senior high schools