An easy-to-use instrument to accurately determine the intensity of phototherapy treatment.

The MTTS Lightmeter provides precise measurement of the intensity of the blue light spectrum that is necessary to treat jaundice in infants. This measurement allows health professionals to ensure phototherapy units are working correctly and determine when a phototherapy device or its bulbs need to be replaced.
The Lightmeter was developed for use with the MTTS Firefly and MTTS Overhead Phototherapy V3000, but it can be used for any phototherapy unit with LEDs, fluorescent bulbs or compact bulbs. When measuring a single-sided phototherapy machine, the Lightmeter will measure the light using the front sensor. When measuring a double-sided phototherapy, the MTTS Lightmeter reads the intensity from both sides, using the sensors on the front and back of the device. It then displays the sum of the values from each side.


By measuring the wavelength spectrum from 450 to 465 nanometers, the Lightmeter gives a reliable irradiance measurement and helps to comply with the American Academy of Pediatrics Guidelines.


The Lightmeter provides a quick and accurate measurement of therapeutic light intensity from any kind of phototherapy device to make sure that the patient is receiving the most effective amount of light.


The Lightmeter can also be used as a tool for clinical decision making, allowing the care giver to determine how to position the baby, maximize light exposure, and provide the strongest phototherapy.

Key Features

Compact, handheld unit.
For the measurement of neonatal phototherapy units.

1. Sensor
Spectral response chosen to match wavelength used for Jaundice treatment.
Two sided measurement for convenient measurement of double-sided phototherapy devices such as MTTS Firefly.

2. Controls
Touch sensitive button cannot wear out or break.

3. Displays/Indicators
Reflective LCD screen can be read even under bright lights orion sunlight.

4. Battery
Long battery life.
Standard AA alkaline batteries are easy to replace.


Easy To Use

The Lightmeter features a large, clear display that makes it easy to read under all lighting conditions.



The Lighmeter is lightweight and portable. It can be carried around easily and helps health professionals to feel confident in the phototherapy treatment they provide to their patients.



The Lightmeter can be used to measure the intensity of any type of phototherapy device used for the treatment of hyperbilirubinemia in newborn babies, including single-sided and double-sided machines.

Technical Specifications

Dimensions and WeightHeight12.5cm
Performance SpecificationsApplicationLED and blue fluorescent phototherapy light sources.
Measurement Range0.0 to 150 µ
Spectrum Measured450nm to 465nm (1/2 power points)
Accuracy+/- 2%
Standard Warranty1 year
Battery SpecificationsType2xAA 1.5V Alkaline, Non-rechargeable.
LifetimeUp to 120h operating time.
Display SpecificationsDType4 Digit Liquid Crystal Display (LCD)
Environmental SpecificationsOperating Temperature-10°C to 40°C
Storage Temperature-20°C to 45°C
Operation Atmospheric Pressure600 to 1300hPA
Storage Atmospheric Pressure300 to 1500hPA
Operation Humidity10 to 95% RH
Storage Humidity5 to 95% RH
Operation AltitudeUp to 3000m
Storage Altituden/a
Drop/Shock1M onto hard surface, IEC68-2-32
Calibration ScheduleEvery 3 years, measured from delivery date.
Return to MTTS for calibration.
ServicingNo customer serviceable parts.

Standard warranty 1 year.

(Subject to MTTS policy)

Ordering Information and Servicing

Ordering InformationLightmeterItem Order NoBLM-1000Main Unit
AccessoriesBatteriesItem Order NoBLM-10102 x 1.5V alkaline battery required for operation.
Measuring tapeBLM-1020Allows for the verification of the distance from the light source.