TENMARS TM-217 Quantum PAR Meter and Lux Meter

TENMARS TM-217 Quantum PAR Meter and Lux Meter in Sri Lanka

Professional PPFD, PAR, Lux, Foot-Candle and Candela Measurement

The TENMARS TM-217 Quantum Meter is a multifunctional photosynthetically active radiation (PAR) meter and digital light meter designed to measure photosynthetic photon flux density (PPFD), illuminance, and luminous intensity. It measures plant-usable light in the 400–700 nm PAR range, making it suitable for LED grow lights, greenhouses, horticultural research, indoor farming, laboratories, and aquarium lighting assessments.

In addition to PPFD measurements in µmol/m²/s, the TM-217 measures illuminance in lux and foot-candles, as well as luminous intensity in candela. Its separate PPFD and illuminance sensor functions allow users to evaluate both horticultural lighting performance and general visible-light levels with one portable instrument.

Discover our complete selection of Quantum PAR Meters and Full-Spectrum Light Meters – specifications, features, and plant-light measurement instruments in Sri Lanka!

With data logging for up to 50,000 records, USB connectivity, adjustable logging intervals, maximum/minimum hold, four- or five-point averaging, transmittance measurement, comparator mode, illuminance integration, and Daily Light Integral (DLI) measurement, the TENMARS TM-217 is well suited to both field measurements and long-term lighting analysis.

Technical Specifications

Instrument Type: Multifunctional quantum PAR meter and illuminance light meter for PPFD, lux, foot-candle, candela, DLI, and integrated illuminance measurements

PPFD Measurement Range: 0–4000 µmol/m²/s

PPFD Resolution: 1 µmol/m²/s

PPFD Spectral Range: 400–700 nm

PPFD Calibration Uncertainty: ±5% at ambient temperatures between 18°C and 23°C

Illuminance Range: 400.0 / 4000 / 40,000 / 400,000 lux

Foot-Candle Range: 40.00 / 400.0 / 4,000 / 40,000 FC

Illuminance Resolution: 0.1 / 1 / 10 / 100 lux; 0.01 / 0.1 / 1 / 10 FC

Luminous Intensity: Candela (cd), calculated using the configured measurement distance

CD Distance Setting: Adjustable from 0.01 m to 99.99 m; default setting 1.00 m

Lux Accuracy: ±3% for Standard Illuminant A at 2856 K

Lux Linearity: ±5% with reading ±1 below 3000 lux; ±7.5% with reading ±1 from 3000 to 9999 lux

Relative Spectral Response: ±8% CIE visible-light V(λ)

Cosine Characteristic: ±6%

Operating Temperature: 0°C to 50°C

Operating Humidity: Less than 80% RH

Storage Temperature: -10°C to 60°C

Storage Humidity: Less than 80% RH

Display: 4-digit LCD, maximum displayed value 9999

Data Logging Capacity: Up to 50,000 automatic records

Manual Record Capacity: Up to 200 manual records

Logging Interval: Adjustable from 5 seconds to 23 hours, 59 minutes, 59 seconds

Battery: 9V 6LR61 alkaline battery

Battery Life: Approximately 60 hours

Meter Dimensions: 140 × 65 × 37.5 mm

Sensor Dimensions: 81 × 57 × 28 mm

Sensor Cable Length: Approximately 100 cm

Weight: Approximately 300 g

Key Features

Quantum PAR Measurement: Measures PPFD from 0 to 4000 µmol/m²/s across the 400–700 nm photosynthetically active radiation range

Multi-Function Light Testing: Measures PPFD, lux, foot-candles, candela, transmittance, integrated illuminance, and Daily Light Integral

Full-Spectrum Lighting Support: Suitable for evaluating sunlight, LED grow lights, greenhouse lighting, indoor farming systems, and other plant-lighting sources within the PAR range

Large Data Memory: Stores up to 50,000 automatic logging records and up to 200 manual measurement records

USB Data Transfer: Connects to a computer through USB for transferring recorded measurements and reviewing logged data

Adjustable Recording Interval: Configurable automatic logging interval from 5 seconds to 23 hours, 59 minutes, and 59 seconds

Data Hold: Freezes the current reading for convenient recording or inspection

Maximum and Minimum Hold: Captures the highest and lowest measured values during an inspection

Four- and Five-Point Average: Calculates an average reading from multiple measurement positions to help assess lighting uniformity

Automatic and Manual Ranging: Supports automatic range selection and manual range selection for controlled measurements

Backlit LCD: Provides improved display visibility in dim indoor environments

Spectral Correction Factors: Provides selectable correction factors for different light-source spectral characteristics, with user-adjustable settings available for supported correction profiles

Transmittance Measurement: Calculates percentage transmittance using a reference measurement

Time-Hold Measurement: Automatically captures and freezes a reading after a configured countdown

Comparator Function: Compares live readings against preset upper and lower limits

Illuminance Integration: Accumulates illuminance over a selected measurement period

Daily Light Integral: Calculates DLI in mol/m²/day and stores up to 99 daily DLI records

Auto Power-Off: Powers off after approximately 15 minutes of inactivity; the function can be disabled when required

Overload Indication: Displays “OL” when the measured value exceeds the selected range

External Power Support: Includes a 100–240 V AC to 9 V DC adapter for extended operation

Standards and Compliance

Photometric Standards: DIN 5032-7:2017 Class C, JIS C 1609-1:2006 Class A, JJG 245-2005 Class B, and CNS 5119

Operating Environment: Indoor use, altitude up to 2000 m, Pollution Degree 2

Applications

Measuring PPFD from LED grow lights in indoor farms and grow rooms

Checking light intensity and uniformity across greenhouse growing areas

Evaluating horticultural lighting for commercial plant production

Comparing PAR output from LED, fluorescent, HPS, daylight, and other lighting systems

Monitoring plant-light exposure for research and controlled-environment agriculture

Measuring lux and foot-candle levels in commercial, architectural, and industrial lighting

Calculating luminous intensity in candela at a defined measurement distance

Monitoring accumulated illuminance over time using the integration function

Calculating Daily Light Integral for crop and plant-lighting studies

Checking aquarium and reef lighting where an appropriate PAR measurement workflow is required

Performing laboratory, educational, field, and research lighting measurements

Measurement Functions

PPFD Mode: Displays photosynthetic photon flux density in µmol/m²/s

Lux Mode: Measures visible-light illuminance in lux

Foot-Candle Mode: Measures illuminance in foot-candles

Candela Mode: Calculates luminous intensity using the configured source distance

ACC Mode: Integrates illuminance over time

DLI Mode: Calculates daily light integral in mol/m²/day

AVG Mode: Calculates four-point or five-point average readings

COMP Mode: Indicates whether readings are above, below, or within preset limits

LOG Mode: Automatically records measurements at a selected interval

REC Mode: Stores individual readings manually

Package Includes

1 × TENMARS TM-217 Quantum PAR Meter and Lux Meter

1 × PPFD / illuminance light sensor

1 × USB cable

1 × 9V battery

1 × AC 100–240 V to DC 9 V/0.5 A power adapter

1 × Carrying case

1 × English user manual

Downloads

📄 Download TENMARS TM-217 User Manual