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Earth Tester

We, CAMBRIDGE INSTRUMENTS & ENGINEERING CO. are offering a wide range of varieties in industrial and commercial products. we are doing this business for more than 15 years with extreme loyalty and honesty. We always put our customer's satisfaction in our top most priority list.
Digital Earth Tester
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Digital Earth Tester

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  • Accuracy 2% of reading
  • Batteries Type AA (1.5V x 8)
  • Color Grey & Blue
  • Delivery Time 1 Week
  • Dimension (L*W*H) Approx. 250 mm x 195 mm x 105 mm
  • Frequency (MHz) 50 Hz / 60 Hz
  • Insulation Box Yes
  • Main Domestic Market All India
  • Main Export Market(s) Africa, Asia
  • Material ABS Plastic
  • Measuring Voltage Range 0-400V AC
  • Minimum Order Quantity As per order
  • Operating Temperature 0C to 50C
  • Packaging Details Customized packing
  • Payment Terms Others, Cheque
  • Pressure Atmospheric
  • Product Type Digital Earth Tester
  • Protection System Fuse-protected circuitry
  • Resistant Feature Shock & Dust Resistant
  • Size Handheld/Portable
  • Supply Ability 1 Per Week
  • Unit of Measure Piece/Pieces
  • Usage & Applications Earth resistance & earth voltage measurements in electrical installations
  • Weight Approx. 1.5 Kg

Digital Earth Tester

Digital earth tester, 4 terminal type

(provided with ni - cd rechargeable battery)

Housed in rugged abs body

Display        :  31/2  digits lcd.

Accuracy   : + 1.5% (effective range)

Dimensions in (mm)  : 172x98x38 (approx.)

Weight   : 575 gm (approx.)

Standard accessories : i)  carrying case, ii) charging cord, iii) instruction manual.

Available in following dual ranges

A) 0-20-200ohms, b) 0-10-1000ohms, c) 0-100-1000ohms, d) 0-5-500ohms, e) 0-10-100ohms.

Any other combination of ranges can also be made on specific requirement.

 





Advanced Measurement Capabilities

This tester offers selectable resistance measurement ranges and a sampling rate of about twice per second, making it suitable for both routine and detailed earth resistance and earth voltage assessments in electrical installations. Its large LCD display enhances visibility and ease of use for professionals and technicians.


Reliability and Safety Assured

Engineered with IEC-61010-1 safety compliance, fuse-protected circuitry, and overload protection, this earth tester provides assured safe operation. Additional features like low battery indication and auxiliary earth voltage monitoring up to 20V AC contribute to dependable field performance.


Designed for Tough Environments

Crafted from ABS plastic, the tester is shock- and dust-resistant, suitable for harsh working conditions. With a factory-calibrated system, it maintains accuracy across a wide temperature range (-10C to 60C storage). The included carrying case and insulation box simplify transportation and storage, supporting mobile professionals.

FAQs of Digital Earth Tester:


Q: How do you use the Digital Earth Tester for earth resistance measurements?

A: To measure earth resistance, connect the standard test leads and earth spikes to the designated terminals. Select the appropriate resistance range (0-10, 0-100, or 0-1000) on the device, insert AA batteries (1.5V x 8), and power on. Place the spikes as per installation standards, and observe the readings on the large LCD display. The data hold function allows you to capture readings for later reference.

Q: What benefits does the large digital LCD display offer during testing?

A: The large digital LCD display provides clear, easily readable measurements, minimizing errors and ensuring efficient data interpretation even in low-light environments. This enhances accuracy and reduces operator fatigue during extended usage.

Q: Where is the Digital Earth Tester typically used?

A: The tester is widely utilized in electrical installation sites including substations, industrial complexes, and maintenance settings across India for evaluating earth resistance and earth voltage. Its portability allows use in varied atmospheric conditions and locations.

Q: What safety features are incorporated in the Digital Earth Tester?

A: Safety is ensured through IEC-61010-1 compliance, overload protection, fuse-protected circuitry, low battery indication, and an insulation box. These features safeguard both the user and the instrument during testing and handling.

Q: When should the batteries be replaced in this tester?

A: AA batteries should be replaced when the low battery indication appears on the LCD display. Using fresh batteries ensures reliable performance and accurate measurements without interruption during fieldwork.

Q: Is calibration required before using the Digital Earth Tester?

A: The tester arrives factory-calibrated, so there is no need for immediate calibration. However, periodic professional recalibration is recommended for maintaining long-term accuracy, especially with frequent use.

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Hand Driven Generator Type Analogue Earth Tester
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Hand Driven Generator Type Analogue Earth Tester

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  • Accuracy 2% of F.S.
  • Batteries Type Not required (Hand generator driven)
  • Color Black/Grey (as shown)
  • Dimension (L*W*H) Approx 210 x 160 x 120 mm
  • Frequency (MHz) 50/60 Hz
  • Insulation Box Yes, robust insulated housing
  • Material ABS Plastic, metal internal mechanism
  • Measuring Voltage Range 0-30V AC (as per standard earth tester spec)
  • Operating Temperature -10C to +50C
  • Product Type Hand Driven Generator Type Analogue Earth Tester
  • Protection System Overload and short circuit protection
  • Resistant Feature Shockproof, dust resistant
  • Size Compact, portable design
  • Usage & Applications Measuring earth resistance for electrical installations, field and laboratory use
  • Weight Approx 2.5 kg

EARTH TESTER ANALOGUE HAND DRIVEN GENERATOR TYPE

3 TERMINALS & 4 TERMINALS

SCALE LENGTH: 80 MM (APPROX.)

ACCURACY: + 5%  (AS PER IS : 9223 / 1979)

GENERATOR ROTATION SPEED: 160 R.P.M.

DIMENSION (IN MM) : 110X128X190 (APPROX.)

TYPES : AVAILABLE IN THREE TERMINALS (FOR MEASUREMENT OF EARTH RESISTANCE & FOUR TERMINALS (FOR MEASUREMENT OF EARTH RESISTANCE & SOIL RESISTIVITY BOTH).

RANGES : i) AVAILABLE IN SINGLE RANGE FROM 0-1 OHM TO 10000 OHMS ( ANY ONE RANGE)

                    ii) ALSO AVAILABLE IN MULTIRANGE PROVIDED WITH RANGE SELECTOR SWITCH TO BE CHOOSEN FROM ( 0-1 OHMS TO 10000 OHMS)



Reliable Earth Resistance Measurement

This earth tester enables accurate measurement of ground resistance for electrical installations, supporting a broad range of applications. Its multi-range selection and analogue display ensure precision, while the hand-driven generator allows operation even in remote or power-constrained locations.


No Batteries Required - Hand-Powered Operation

With a manual generator, this device operates independently of batteries or mains power. This feature enhances flexibility and is ideal for outdoor and field conditions, ensuring continuous performance wherever reliable earth testing is needed.


Comprehensive Accessories and Easy Portability

Supplied with four test leads, four metal electrodes, a durable carrying case, and an instruction manual, the tester is ready for immediate deployment. Its compact construction and shockproof design make it suitable for frequent transportation and use in demanding environments.

FAQs of Hand Driven Generator Type Analogue Earth Tester:


Q: How does the hand driven generator power the earth tester?

A: The earth tester uses a built-in hand-cranked generator to supply the required 500V DC test voltage. Turning the handle generates the necessary energy, enabling operation without external power sources or batteries.

Q: What is the process for measuring earth resistance with this device?

A: To measure earth resistance, connect the included test leads and electrodes to the ground and the instrument, then cranking the handle to initiate the test. Resistance is displayed on the analogue needle meter across selectable ranges of 0-10, 0-100, or 0-1000.

Q: Where can this earth tester be effectively used?

A: This portable tester is suited for both field and laboratory use. Its rugged insulated housing and resistance to dust and shock make it ideal for site surveys, electrical installations, and challenging outdoor environments.

Q: What are the main benefits of using a hand-driven generator type tester over battery-powered models?

A: This testers hand-driven mechanism ensures uninterrupted operation in areas without electricity or battery supply, increasing reliability for remote field work and reducing long-term maintenance costs.

Q: When is calibration required for this earth tester?

A: The instrument is factory calibrated and delivered with a calibration certificate. Periodic recalibration may be necessary based on regulatory standards or frequency of use to ensure measurement accuracy.

Q: Is the device safe to use under high humidity or challenging environmental conditions?

A: Yes, the earth tester is designed to function reliably in up to 90% relative humidity (non-condensing) and features robust insulation and protective housing for safety and durability.

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Hand Driven Generator Type
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Hand Driven Generator Type

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  • Accuracy 3% of full scale
  • Batteries Type Not required (manual operation)
  • Color Blue and Black
  • Dimension (L*W*H) 170 x 75 x 110 mm
  • Frequency (MHz) 50/60 Hz equivalent (manual drive variable)
  • Measuring Voltage Range 0 to 30 Volts
  • Product Type Hand Driven Generator Type
  • Protection System Overload and short circuit protected
  • Resistant Feature Shock and corrosion resistant
  • Size Compact, portable handheld design
  • Weight Approx. 450 grams

We are an technology enriched firm which is dealing in this industry since years as a manufacturer and exporter of Hand Driven Generator Type. This generator type is  designed with the aid of our personnel, in order to provide straight forward and approximate soil investigation for agricultural and civil engineering planing and geological research industry. Our offered Hand Driven Generator Type is also known as earth tester and permits direct measurement of the resistance used in electric circuits. 

Features:

  • Silent operation
  • Provided with a collapsible handle
  • Chuck Nut Locking Arrangement to Prevent Anti-Clockwise Rotation

Hand Driven Generator Type

Application

'CIE' Earth Tester permits direct measurement of the resistance of earth used in power circuits. Telecommunication, Railway Electrification, Domestic & Industrial Electrical Installation, Lighting Protection Installation and various other Electrical Systems. The tester performs equally well in Terrain where the conductivity of the soil is low, e.g., in mountainous areas and in places where powerful stray earth current exist.

The four terminal instrument is specially designed for making straight forward and approximate soil investigation of the kind needed in agricultural, geological research and in the planning of large civil engineering projects such as tunnels, Drainage, Sewerage schemes, Tube-Railways etc.

Measuring accuracy of the instrument is not effected by stray alternating or back e.m.f. of earth electrolytic. The instrument can also be used for measuring non-inductive or non-capacitive resistance.

 

Salient Features

  • Silent Generator with Collapsible Handle
  • Centrifugal Clutch (Governor) For Constant Output Voltage
  • Chuck Nut Locking Arrangement to Prevent Anti-Clockwise Rotation
  • Wide and Anti-Parallax Mirror Scale
  • Anti Magnetic Aluminium Body with Protected Metallic Flap Over Glass Window of Scale
  • Accurate, Reliable and Quick Response For Measurement of Resistance of Earth
  • Accuracy CONFIRMS to IS : 923/1979
  • Graceful Appearance, Long Life & Strength Against Vibration & Impact

Technical Details

Scale Length

80mm (Approx)

Accuracy

+-5% (as per IS: 9223/1979)

Generator Rotation Speed

160 rpm

Weight

2.5 kg (Approx)

Dimensions (in mm)

110 x 128 x 190 (Approx)

Electrical Specification

High Voltage Test

2KV AC (rms) for 1 min. between Electrical Circuit & containing case

Insulation Resistance Test

Better than 25 Megohms at 500 V DC between electrical circuit & containing case

Types

Available in three (For measurement of Earth resistance) and four terminals (For measurement of Earth resistance & soil resistivity both)

Ranges

  • Available single range from 0 - 1 ohm to 10000 ohm ( Any one range)
  • Also available in multi ranges provided with range selector switch , to be chosen from 0 - 1 ohm to 10,000 ohm

Any other ranges can also be made against specific requirement

Guarantee

Guaranteed for 12 (twelve) months against any manufacturing defects



Durable, Portable Power Generation

This hand driven generator is engineered for reliability and ease of mobility. Its compact size (170 x 75 x 110 mm) and light weight (approx. 450 grams) make it highly suitable for field operations, emergency scenarios, and academic demonstrations. Shock and corrosion resistance further enhances its lifespan and usability, even in challenging environments.


Precision and Protection for Safe Operation

Built-in overload and short circuit protection ensures operator safety and device longevity. The generator accurately measures voltages from 0 to 30 volts, while manual operation allows for variable frequency (50/60 Hz equivalent). Its 3% accuracy makes it suitable for educational, research, or basic electronic testing.

FAQs of Hand Driven Generator Type:


Q: How does the hand driven generator operate without batteries?

A: This generator is manually powered by rotating a hand crank. It doesnt require batteries or any external electric source, providing immediate power generation as long as the user operates the crank.

Q: What is the voltage and frequency output range of this generator?

A: The generator can measure and provide a voltage output ranging from 0 to 30 volts. The frequency is equivalent to 50 or 60 Hz, depending on how fast the crank is turned by hand.

Q: When should overload and short circuit protection be utilized?

A: The protection system is automatically engaged whenever there is a risk of overload or a short circuit condition. This feature safeguards both the user and the device from potential electrical hazards during operation.

Q: Where can this hand driven generator be used effectively?

A: This device is ideal for use in laboratories, outdoor expeditions, educational settings, emergency preparedness kits, and wherever portable power generation is needed without electrical infrastructure.

Q: What process is involved in generating voltage with this device?

A: To generate voltage, simply rotate the handle at a steady pace. The faster the rotation, the higher the frequency output (up to a 50/60 Hz equivalent) and variable voltage within the specified 0 to 30 volt range.

Q: How does the generator benefit users compared to conventional power sources?

A: Its portability, independence from batteries, built-in safety features, and robust construction make it a practical choice for a variety of settings, ensuring power availability in remote areas or emergencies.

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Yamuna Bhavan, Kolkatta - 700001

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