
Authorized Hydroquip Distributor
When you purchase from AquaDoc, you're guaranteed to receive an authentic Hydroquip device. Order with confidence, knowing you'll receive top quality pool equipment.
HydroQuip Gecko Series Temperature Sensor 34-0203D-K
HydroQuip Gecko Series Temperature Sensor 34-0203D-K
HydroQuip Gecko Series 4-Pole 2-Wire temperature sensor with 3/8" bulb and 10’ cord for accurate spa and pool water control.
Couldn't load pickup availability
The HydroQuip 4-Pole 2-Wire Gecko Series Temperature Sensor ensures accurate temperature monitoring in spa and pool systems.
Featuring a 3/8" diameter bulb, it is engineered for precise water temperature detection and control.
The 10’ cord provides flexible installation options, making it easy to integrate into your system.
This sensor is compatible with multiple Gecko control systems, including CS4/6200, 4/6220, 4/6230, 4/6330, 7500, and 9700 models.
It plays a vital role in keeping spa and pool water at a consistent, comfortable temperature.
Durably constructed, it offers long-lasting reliability for both residential and commercial applications.
⭐⭐⭐⭐⭐
Customers value the HydroQuip Gecko temperature sensor for its reliable performance and easy installation.
The 10’ cord length is frequently mentioned as a convenient feature for reaching control systems.
Users note that it helps maintain consistent water temperature, enhancing overall spa and pool comfort.
Its compatibility with a wide range of Gecko systems makes it a dependable replacement part.
Many reviewers highlight that it provides accurate readings, extending the life of their spa equipment.
- Bulb Size: 3/8" diameter for accurate temperature detection
- Cord Length: 10’ for flexible installation
- Compatibility: Works with Gecko CS4/6200, 4/6220, 4/6230, 4/6330, 7500, and 9700 control systems
- Design: 4-pole, 2-wire configuration
- Function: Monitors and regulates water temperature in spas and pools
- Performance: Ensures consistent and comfortable water conditions
• • Application: Suitable for both residential and commercial systems
- Brand: HydroQuip
- Model / Part #: 34-0203D-K
- Product Type: Temperature Sensor
- Bulb Size: 3/8" diameter
- Cord Length: 10 ft
- Configuration: 4-pole, 2-wire
- Compatibility: Gecko CS4/6200, 4/6220, 4/6230, 4/6330, 7500, and 9700 control systems
- Application: Spa and Pool systems
- Minimum Sell Quantity: 1
What control systems is this sensor compatible with?
It is designed for Gecko CS4/6200, 4/6220, 4/6230, 4/6330, 7500, and 9700 control systems.
How long is the cord on this temperature sensor?
The sensor includes a 10’ cord, offering flexibility during installation.
Why is accurate temperature sensing important for spas and pools?
Accurate sensing ensures water remains at the desired temperature, improving comfort and protecting equipment from overheating or underheating.

The price you see is the price you pay.
We don’t play pricing games.
That’s why all orders over $75 ship free—no tricks, no hidden costs.
Why choose AquaDoc?
- 🌟 Top-notch products designed by leading pool & spa brands.
- 📦 Proudly ship locally from the USA, ensuring faster delivery.
- 👷♂️ Every purchase supports American income and jobs.
Order With Confidence
Satisfaction guaranteed! We're here to help with any pool or spa related issues. Contact us anytime for assistance.
Free shipping on all orders over $75!
As seen on
HydroQuip is a leading manufacturer of spa and hot tub control systems, heaters, and electronic components designed for reliable performance and ease of use. Whether you're upgrading a spa pack or replacing a heater, HydroQuip products are built to last. At AquaDoc, we offer a selection of HydroQuip spa systems and parts to keep your hot tub running smoothly year-round.
You may also like
-
Example product title
Regular price $19.99Regular priceUnit price / perSale price $19.99 -
Example product title
Regular price $19.99Regular priceUnit price / perSale price $19.99 -
Example product title
Regular price $19.99Regular priceUnit price / perSale price $19.99 -
Example product title
Regular price $19.99Regular priceUnit price / perSale price $19.99