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Martindale TEK904 Enhanced Decade Resistance Box

The Martindale TEK904 Decade Resistance Box is an accurate and reliable seven decade resistance box with high quality rotary switches that provide in-line readouts.

Next Day Delivery (subject to availability)

£165.00 exc. VAT £198.00 inc. VAT £246.00 inc. VAT
  • 10Ω to 11.1111MΩ
  • 1% Accuracy
  • 6 Decade
  • Rotary Dial Setting
  • Suitable For A Range Of Situations
  • Wide Range Of Ohms
  • FreeDelivery
  • 30DayMoneyBack
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Martindale TEK904 Enhanced Decade Resistance Box

The Martindale TEK904 Decade Resistance Box is an accurate and reliable seven decade resistance box with high quality rotary switches that provide in-line readouts.

The Martindale TEK 904 decade box has an extra terminal so that an accurate potential divider can be created. With a variable resistance range from 1 ohm to 11.1111 Mega ohms, an accuracy of 1% and simple operation this resistance calibration box is perfect for use in the laboratory, for educational purposes and in the calibration of test equipment.

The Martindale TEK904 decade box adds an extra decade at the bottom of the range making for an exceptionally wide range for such a compact instrument. The seven variable decades of this resistance box are 1Ω, 10Ω, 100Ω, 1kΩ, 10kΩ, 100kΩ, 1MΩ.

Key Features:

  • 7 Decade Resistance Box
  • Ranges from 1Ω to 11.1111MΩ
  • Accuracy of 1%
  • Suitable for laboratory, educational & calibration applications

ISSWWW and Martindale Electric

Founded in 1928 and also owns Edgcumbe Instruments Metrohm® products, as well as the John
Drummond Engineers range of test lamps. They are a British owned company, based in Watford, just 5 minutes from junction 5 of the M1. Their product range helps electricians and maintenance engineers carry out portable appliance testing, check fixed wiring for 17th Edition and Part P testing, safely prove dead, and measure everything from light and sound levels to microwave leakage and power consumption.

We are proud to be able to offer Martindale's products and services and have done so for many years.

Martindale TEK904 Enhanced Decade Resistance Box

Typical residual (zero) resistance < 150 mΩ
Incremental accuracy ± 1% of setting
1kΩ divider resistor accuracy ± 1%
Maximum power per resistor 0.6 W
Maximum applied voltage 100 VDC
Temperature coefficient 50 ppm/°C
Operating environment 0°C to 50°C at < 70% RH
Dimensions 345 x 71 x 51 mm
Weight 536g approx

Orders requiring calibration 

Whilst we take the greatest care to get all orders dispatched and delivered to you in the stated time frame, orders received PM and requiring
calibration may on occasion miss dispatch that day, according to the complexity of the calibration. Be assured they will ship on the next dispatch
this in most cases should not add more than 24 hours to your delivery.

Bank/Public Holidays

Predicted delivery times are based on regular trading days Monday to Friday. Public holidays, bank holidays and weekends are outside the usual scope 
of our dispatch and subject to activities/holidays of our carriers and therefore may incur additional days lead time to your order.

*UK Mainland (Temporarily revised June 2020)

Please note that regrettably, we have had to realign our delivery service options to those available from our carriers.
During the current situation surrounding the effects of the Coronavirus pandemic, logistics from every company are under immense pressure to deliver goods on time.
We have taken the decision to temporarily limit our services rather than let our customers down.
We hope you will understand our position on this and we apologise unreservedly for the inconvenience we know this will cause.
We look forward to restoring our full delivery service schedule just as soon as we are able.

Standard FREE 1-2 Day Courier Delivery – UK Mainland only - Zones A & B

Included in the price for all orders over £75.00 (exc vat). Sent using express courier, delivered within 1-2 working days from the date of your order, subject to availability.


Next Day Anytime Delivery (Excluding Saturday & Sunday) – UK Mainland only - Zones A & B
Sent by express courier, delivered next day (excluding weekends) from the date of your order, subject to availability.


Orders must be placed before 3:00pm for a qualifying next day delivery and a telephone number supplied, subject to availability.

New Postage Map Sept 2018>

Delivery Surcharges

Because of the high cost of carriage, we need to apply a surcharge on all deliveries made in the following regions bringing the carriage charges to:

  • Zones A & B  - Mainland delivery rates apply. 
  • Zone C - Scottish Highlands (Charges are calculated at the checkout).
  • Zone D - Outer Hebrides, Orkney Isles, Shetland Isles, Isle of Man, Scilly Isles, and Channel Islands (Charges are calculated at the checkout).
  • Zone E - Northern Ireland (Charges are calculated at the checkout).
  • Zone F - Republic of Ireland (Charges are calculated at the checkout).

Offshore Services

All offshore deliveries are a 2 day service as standard. This includes Channel Islands, Northern & Southern Ireland, Scottish Islands, Isle of Man and the Scilly Isles.

International Delivery

International delivery charges are automatically added to your order at the checkout. For any questions regarding international deliveries please contact us at


All export inquiries should be directed to the export division before placement of order.

If no shipping option is available to your selected country please call us FREE on 0800 0224 060 to purchase your items.
All stated prices are subject to VAT at the current rate where applicable E&OA