The testo 540 entry-level light meter is designed for carrying out spot checks in the workplace, shops, and offices. The light sensor is modelled on the spectral sensitivity of the human eye, and is ideal for measuring lighting conditions in the workplace.
This compact, easy to use meter has a number of useful functions and features, including a large, easy to read display, min/max values, a hold function, and a protective cap for safe storage.

Features:

For quick and easy measurements in the workplace
Sensor based on the spectral sensitivity of the human eye
Hold function, min/max values
Protective cap for safe storage

More products TESTO

BASE - FOR SAVERIS 868 MHZ

• Up to 150 probes can be connected
• Graphical display, 4 control keys
• Interfaces: radio, Ethernet, USB
• Alarm relay for connecting alarm transmitters

TESTO 206 PH2 - INSTRUMENT KIT

• pH2 probe head for semi-solid food
• Automatic full-scale recognition
• Maintenance-free gel electrolyte
• Leak-proof storage gel

TESTO 206 PH3 - ONE-HAND PH/TEMPERATURE MEASURING INSTRUMENT FOR CONNECTING EXTERNAL PROBES

• External pH probe can be connected - for flexible use
• Automatic final value recognition
• Robust and waterproof thanks to TopSafe (IP 68)
• Automatic temperature evaluation (if a probe with temperature sensor is connected)

TESTO 606-1 - MOISTURE METER

• Precise moisture measurements in wood / cement etc.
• Characteristic curves for wood / building materials
• Hold function: freezes the last reading for convenient use
• Backlit display for use in all lighting conditions

TESTO 805 - MINI INFRARED THERMOMETER

• Infrared thermometer for non-contact surface temperature measurements
• TopSafe protective case (optional) protects from water and dirt in accordance with IP 65
• Scan mode for long-term measurement
• Pocket size measuring instrument: compact for easy handling

TESTO 316-3 REFRIGERANT LEAK DETECTOR

• Can detect all the most common cooling agents: CFCs, HFCs, FCs
• Highly sensitive - detects even the smallest leaks
• Easy-to-use one-button operation
• Complies with specifications for F gases regulations, SAE Code J1627 and DIN EN 14624:2012 standard

TESTO 549I - REFRIGERATION PRESSURE WIRELESS SMART PROBE

• Measures high-side or low-side refrigerant pressure (or both simultaneously, with 2 probes) in AC and refrigeration systems
• No hoses required; clean, simple, and accurate
• Low-loss refrigerant pressure testing!
• Use with the testo 115i pipe-clamp temperature probes for automatic superheat and subcooling calculations

TESTO SAVERIS 2-T1 - WI-FI TEMPERATURE DATA LOGGER WITH INTERNAL NTC TEMPERATURE SENSOR

• Internal temperature NTC thermistor sensor
• Large, easy to read display
• Automatically transmits data over 2.4 GHz Wi-Fi networks
• Stores up to 10,000 values (temperature)

TESTO 317-1 - GAS SPILLAGE DETECTOR

• Reliable detection of escaping flue gases
• Flexible probe for inaccessible areas
• Acoustic and visual alarm

TESTO 175H1 - TEMPERATURE AND HUMIDITY DATA LOGGER

• Internal NTC thermistor provides reliable temperature monitoring with a small footprint
• External "stump" humidity probe for quick, accurate measurements
• Large easy to read backlit display
• Large data memory capable of storing 1,000,000 measurements