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Sets
Mindstorms
Temperature Sensor

9889 LEGO Mindstorms Temperature Sensor

Name: LEGO Mindstorms Temperature Sensor
Brand: LEGO
SKU: 9889-1
Availability: InStock
Rating: 4.60 (28 reviews)

Images 1Description 1

LEGO 9889 Temperature Sensor is a Mindstorms set currently valued at $28 for new and sealed sets. Annual appreciation has averaged 3.60% since release. Used copies are valued between $4 and $5 depending on condition.

Set Value (New/Sealed)

This chart represents the current new/sealed value of the set Temperature Sensor since June 2016. High accuracy

LEGO 9889 Temperature Sensor is a Mindstorms accessory set released in 2004, containing 1 piece. It features a non-powered analog temperature sensor designed for use with the RCX intelligent brick. The sensor can be calibrated through the RCX and compatible software such as ROBOLAB.

A new and sealed Temperature Sensor is currently valued at around $28, with annual growth of approximately 2%. The average used price is $4 for those in good overall condition. Based on current trends, this set could be valued near $29 within the next year.

All regions

All regions 1
Germany 1

For Sale (New/Sealed)

(DE) BrickLink store E1M1 - At Brick's Gate

$28.92

+5.0%

Sale Trends

This chart shows the sales trends (number sold) of new/sealed 9889 Temperature Sensor.

Sets in Mindstorms / 1


	9719 Robotics Invention System Theme / Subtheme Mindstorms / 1 Year 1998 Pieces 733 Availability Retired Buy this set at Amazon eBay	Retail $199.99 Value $200.00 Growth +0.0% I own this set I want this set

	9747 Robotics Invention System Theme / Subtheme Mindstorms / 1 Year 1999 Pieces 726 Availability Retired Buy this set at eBay Bricklink	Retail $199.99 Value $205.18 Growth +2.6% I own this set I want this set

	9735 Robotics Discovery Set Theme / Subtheme Mindstorms / 1 Year 1999 Pieces 390 Availability Retired Buy this set at eBay	Retail $149.99 Value $171.20 Growth +14.1% Annual growth 1.9% I own this set I want this set

	3800 Ultimate Builders Set Theme / Subtheme Mindstorms / 1 Year 2001 Pieces 321 Availability Retired Buy this set at Amazon eBay Bricklink	Retail $59.99 Value $156.43 Growth +160.8% Annual growth 4.7% I own this set I want this set

	9736 Exploration Mars Theme / Subtheme Mindstorms / 1 Year 2000 Pieces 155 Availability Retired Buy this set at eBay	Retail $49.99 Value $63.41 Growth +26.8% Annual growth 7.6% I own this set I want this set

	9732 Extreme Creatures Theme / Subtheme Mindstorms / 1 Year 1998 Pieces 148 Availability Retired Buy this set at eBay	Retail $49.99 Value $64.47 Growth +29.0% I own this set I want this set

	9731 Vision Command Theme / Subtheme Mindstorms / 1 Year 2000 Pieces 138 Availability Retired Buy this set at eBay Bricklink	Retail $99.99 Value $108.41 Growth +8.4% I own this set I want this set

	9730 Robo Sports Theme / Subtheme Mindstorms / 1 Year 1998 Pieces 91 Availability Retired Buy this set at Amazon eBay	Retail $49.99 Value $50.83 Growth +1.7% I own this set I want this set

	3803 Robotics Invention System Upgrade Kit Theme / Subtheme Mindstorms / 1 Year 1999 Pieces 70 Availability Retired Buy this set at eBay Bricklink	Retail $24.99 Value $43.13 Growth +72.6% Annual growth 2.0% I own this set I want this set

	3801 Ultimate Accessory Set Theme / Subtheme Mindstorms / 1 Year 2000 Pieces 45 Availability Retired Buy this set at Amazon eBay	Retail $49.99 Value $66.73 Growth +33.5% Annual growth 6.4% I own this set I want this set

	9911 Touch Sensor and Leads Theme / Subtheme Mindstorms / 1 Year 2004 Pieces 3 Availability Retired Buy this set at eBay Bricklink	Retail $11.99 Value $19.99 Growth +66.7% Annual growth 2.6% I own this set I want this set

	9713 Infrared Transmission Tower Theme / Subtheme Mindstorms / 1 Year 1998 Pieces 2 Availability Retired Buy this set at eBay Bricklink	Retail $24.99 Value $25.00 Growth +0.0% I own this set I want this set

	9757 Touch Sensor Theme / Subtheme Mindstorms / 1 Year 1999 Pieces 2 Availability Retired Buy this set at eBay	Retail $10.99 Value $15.25 Growth +38.8% Annual growth 1.2% I own this set I want this set

	3805 Robotics Invention System Upgrade Kit Theme / Subtheme Mindstorms / 1 Year 2001 Pieces 1 Availability Retired Buy this set at eBay Bricklink	Retail $19.99 Value $80.49 Growth +302.7% Annual growth 5.7% I own this set I want this set

	9709 RCX Programmable LEGO Brick Theme / Subtheme Mindstorms / 1 Year 1999 Pieces 1 Availability Retired Buy this set at Bricklink	Retail $109.99 Value $119.99 Growth +9.1% I own this set I want this set

	9738 RCX Remote Control Unit Theme / Subtheme Mindstorms / 1 Year 1999 Pieces 1 Availability Retired Buy this set at Bricklink	Retail $19.75 Value $20.90 Growth +5.8% I own this set I want this set

	9755 Temperature Sensor Theme / Subtheme Mindstorms / 1 Year 1999 Pieces 1 Availability Retired Buy this set at eBay Bricklink	Retail $23.99 Value $27.00 Growth +12.5% I own this set I want this set

	9756 Rotation Sensor Theme / Subtheme Mindstorms / 1 Year 1999 Pieces 1 Availability Retired Buy this set at Bricklink	Retail $14.99 Value $16.57 Growth +10.5% I own this set I want this set

	9758 Light Sensor Theme / Subtheme Mindstorms / 1 Year 1999 Pieces 1 Availability Retired Buy this set at eBay	Retail $19.75 Value $19.99 Growth +1.2% Annual growth 2.1% I own this set I want this set

My Collection

I own this set

I want this set

Set Details

Set number

9889-1

Name

Temperature Sensor

Theme

Mindstorms

Subtheme

Year

2004

Availability

Retired

Pieces

1 (PPP $24.99)

Set Pricing

Retail price

$24.99

New/Sealed

Value

$27.55

Growth

+10.24%

Annual growth

+3.60% Decreasing

2025 growth

--2.13%

90-day change

0.65%

Used

Value

$4.31

Range

$4.23 - $5.18

Quick Buy

eBay

Buy

Price

$26.72

Bricklink

Buy

Lowest price

$28.92 (DE)

*Listings are for new/sealed sets.

Set Predictions

New/Sealed

Today's value

$27.55

1 year forecast

$28.54+3.60%

5 year forecast

$32.46+17.84%

$31

$33

9889 Temperature Sensor is projected to be valued between $31 - $33 within five years.

Insights

Retired and tied to the original RCX-era Mindstorms line, Temperature Sensor (9889) draws technical nostalgia for completists and educational collectors, and extended retirement has created some scarcity, but narrow compatibility demand and thin trading volume keep secondary-market momentum limited.

Set Facts

It features a non-powered analog temperature sensor, compatible with the RCX brick.
The LEGO MINDSTORMS RCX temperature sensor is a non-powered analog sensor.
It can be calibrated to measure temperatures ranging from -20 °C to +50 °C (-4 °F to +122 °F).
Calibration is done using the RCX intelligent brick and ROBOLAB software.

Regional Retail Prices (LEGO.com/Store)

United States

$24.99

United Kingdom

£24.67

Temperature Sensor Reviews

28 ratings

4.6

Collectors

Investors

Subtheme Analysis

Mindstorms / 1

Sets

Years

1998 - 2004

Annual growth

+2.11% (this set +3.60%)

This set's annual growth (CAGR) vs. subtheme

Community Stats

Temperature Sensor currently ranks #13 out of the top most owned sets in Mindstorms 1.

#1Robotics Invention System

#2Robotics Invention System

#3Vision Command

#4Ultimate Accessory Set

#5Exploration Mars

#13Temperature Sensor

#14Rotation Sensor

#15Touch Sensor and Leads

About Mindstorms 1

This was the first generation of the LEGO Mindstorms platform also known as the original Robotics Invention System.

1 consists of 20 sets that ran from 1998 to 2004. As of today, 9747 Robotics Invention System is the most valuable 1 set with an estimated new/factory sealed value of $205.

The temperature sensor is a non-powered analog sensor. Using the LEGO MINDSTORMS RCX intelligent brick and ROBOLAB software, it can be calibrated to measure in Celsius and Fahrenheit (-20 °C to +50 °C/-4 °F to +122 °F).

Set Pricing Models

BrickEconomy uses a number of methods to determine the value of a set.

New/Sealed

Machine Learning/AI Model

Value (today)

$27.55

Value (in a year)

$28.54

Value (in 2 years)

$29.54

Accuracy

0.920200 High

Statistical Model

Value (today)

$26.15

Value (in a year)

(Possible plateau)

Value (in two years)

(Possible plateau)

Accuracy

0.645358 Medium

Used

Machine Learning/AI Model

Value (today)

$4.31

Value (low range)

$4.23

Value (high range)

$5.18

Accuracy

0.865200 High

To learn more about how we calculate pricing and forecasting, check out our article on BrickEconomy’s Approach to LEGO Pricing and Future Value Predictions.

Region · United States (USD)

Theme · Light

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