Joulemeter, Low Voltage
Product Code : LSK-PL-10282
Joulemeter, Low Voltage (SKU LSK-PL-10282) measures the electrical energy, from 1 mJ to 9999 J, or the power, from 1 mW to 200 W, delivered in low-voltage AC or DC circuits. It suits heat and electricity practicals such as specific heat capacity in schools and colleges. Science Lab Supplies builds the meter at its Plot 448 factory in the HSIIDC Industrial Area, Saha, Ambala, India, and deals directly with schools, colleges, tender contractors and distributors.
Specifications
Ranges, limits and connections of the low-voltage joulemeter are given one per row below. In short, a switch picks the mJ/mW or J/W range, the auto-ranging four-digit display reads energy or power directly, the J/W range takes up to 10 A and 200 W, and every connection is a 4 mm socket.
| Specification | Value |
|---|---|
| SKU | LSK-PL-10282 |
| Measures | Energy or power in AC or DC circuits |
| Energy range | 1 mJ to 9999 J |
| Power range | 1 mW to 200 W |
| Range selection | Switch labelled mJ/mW and J/W |
| Display | Auto-ranging, four digits, direct reading |
| Max load current, J/W range | 10 A |
| Max load current, mJ/mW range | 10 mA |
| Max energy, J range | 9999 J |
| Max energy, mJ range | 9999 mJ |
| Max power, W range | 200 W |
| Supply voltage | 20 V DC, 14 V AC (rms) |
| Input resistance (no load) | 2 MΩ |
| Connections | 4 mm sockets |
| Manufacturer | Science Lab Supplies, Saha, Ambala, Haryana |
| Country of origin | India |
Applications and Experiments for the Low Voltage Joulemeter
The joulemeter replaces the voltmeter, ammeter and stopwatch combination in electrical heating experiments, reading the energy supplied to a heater directly in joules. That makes it useful for specific heat capacity, latent heat and power measurements in school physics and college heat and thermodynamics labs.
- Specific heat capacity of a metal block or water, with the temperature rise read from the Thermometer Set.
- Specific latent heat of fusion or vaporisation.
- Class 10 electricity: electrical energy and power.
- Energy used by small, low-current loads on the mJ/mW range.
- Wiring the meter between supply and heater with Connecting Leads with 4 mm Safety Plugs.
Standard Scope of Supply
This low-voltage joulemeter is supplied as a single meter as described above, with its range switch, four-digit display and 4 mm connection sockets. A low-voltage supply, immersion heater, calorimeter block and leads are separate items that can be listed on the same quotation.
Packing, MOQ and Lead Time
Send the number of meters you need, one for a demonstration or a class set, and the quotation will show the packing, delivery time and price for that quantity. Heaters, heating blocks and supplies can be added so the heat and thermodynamics lab equipment is quoted together.
Science Lab Supplies has an Importer-Exporter Code and, as a registered exporter, can ship to buyers in Oman, the Philippines, Nepal, Bangladesh, Zambia and Rwanda. Technical questions on the meter are answered through the contact page, a priced list is built in the enquiry cart, and tendered orders follow the lab tender page.
Frequently Asked Questions
What is the difference between the two ranges?
The J/W range reads up to 9999 J or 200 W with load currents up to 10 A. The mJ/mW range reads up to 9999 mJ for small loads, with current limited to 10 mA.
Can it be used on AC as well as DC?
Yes. It measures energy or power in AC and DC circuits. The supply voltage is 20 V DC or 14 V AC (rms), so it is intended for low-voltage circuits only.
Is Science Lab Supplies the manufacturer or a trader?
Every unit is produced at the company’s works in Saha, Ambala, India, so the quotation reaches you directly from the manufacturer, Science Lab Supplies, without an intermediary.
Can a class set be quoted for a tender?
Yes. Share the quantity, delivery location and specification, and the meters will be quoted item by item with any heaters or blocks in the same tender.
Related Heat and Energy Equipment
An electrical-heating experiment needs a heater, something to heat, a low-voltage supply and a meter. The items below complete that setup around the joulemeter, or offer a student alternative and other calorimeters, and they can all go on one quotation for a heat laboratory.
- Student Digital Joulemeter — accuracy 3% (1% typical), powered by an included 9 V DC adaptor.
- Immersion Heater — 12.5 x 100 mm sheathed element with 4 mm sockets.
- Calorimeter Heating Block — drilled with a 12.5 mm heater hole and a 7.5 mm thermometer hole.
- Multitap Transformer — AC tappings at 0, 2, 3, 8 and 12 V, 6 A continuous.
- Copper Calorimeter Set — rests on a felt pad in a 100 x 75 mm outer vessel, with stirrer.
- Joule’s Calorimeter — 5 x 7.5 cm copper calorimeter with terminals for a heating coil.
- AC/DC Laboratory Power Supply — 150 VA regulated supply with 4 mm connections.
Browse the full Physics Lab range, the Heat range, or all physics lab equipment.
Last updated: 22 October 2026
