
3-9750-21 Comparison
| photo | price | summary | rating |
|---|---|---|---|
![]() | $22.89 | Condition is Used, Georg Fischer Signet 3-9750-21 pH ORP Controller 3975021 Process Industrial OEM, FREE SHIPPING | 99.6% |
![]() | $26.16 | Condition is Used, Signet Scientific 3-9750-21 pH Controller USIP, FREE SHIPPING | 99.8% |
![]() | $218.70 | Condition is Used, GEORG FISCHER SIGNET 3-9750-21 / 3975021 (USED), shipping cost = $12.90 | 99.7% |
![]() | $290.00 | Condition is Used, Signet pH Controller 3-9750-21, FREE SHIPPING | 98.6% |
![]() | $279.72 | Top Pick! Condition is Used, Signet Scientific 3-9750-21 3975021 Ph Controller, shipping cost = $91.00 | 100.0% |
| photo | price | summary | rating |
|---|---|---|---|
![]() | $279.99 | Top Pick! Condition is New – Open box, Signet Scientific 3-9750-21 3975021 Ph Controller New , FREE SHIPPING | ![]() |

The Signet Scientific 3-9750-21 USIP Controller is a versatile and advanced instrument designed for precise temperature control in various applications, particularly in the field of chemical and biochemical research. This controller features a user-friendly design, intuitive interface, and high-performance capabilities, making it an indispensable tool for scientists, researchers, and laboratory technicians.
At its core, the 3-9750-21 USIP Controller is an under-stirred temperature programmer, capable of maintaining constant temperatures between 0 C and 150 C with an accuracy of 0.1 C. Its unique under-stirred design ensures that temperature is uniformly controlled throughout the reaction vessel, eliminating hot spots and ensuring consistent results. The controller also includes a built-in heating mantle, making it a standalone system that does not require external heating sources.
The controller's interface is user-friendly and intuitive, with a large, backlit LCD display that shows temperature readings, set points, and other important information. The controller also includes a keypad for easy navigation and setting of temperature parameters. Additionally, it features a USB interface for easy data logging and transfer to other software programs for further analysis.
The 3-9750-21 USIP Controller is designed with flexibility in mind, with the ability to control up to four temperature zones independently. This makes it an ideal choice for multi-step reactions or for use in multiple reaction vessels. It also includes a built-in timer function, allowing for automated temperature ramping and holding at specific temperatures.
The controller is constructed with high-quality materials and components, ensuring durability and reliability in even the most demanding laboratory environments. It is also designed with safety in mind, featuring over-temperature protection and an automatic shut-off function to prevent damage to the instrument or the reaction vessel.
Overall, the Signet Scientific 3-9750-21 USIP Controller is a powerful and versatile instrument that offers precise temperature control for a wide range of applications in the field of chemical and biochemical research. Its user-friendly design, high-performance capabilities, and flexibility make it an essential tool for any laboratory.
The Signet Scientific 3-9750-21 USP (United States Pharmacopeia) controller is a popular choice for those seeking a reliable and accurate solution for their USP compliance needs. Here are some pros and cons that may help you make an informed decision about purchasing this product:
Pros:1. USP Compliance: The primary advantage of the Signet Scientific 3-9750-21 USP controller is its USP compliance. This means that it meets the stringent standards set by the United States Pharmacopeia, ensuring the accuracy and reliability of the temperature readings.
2. Wide Temperature Range: The controller supports a wide temperature range of -20 C to 125 C (-4 F to 257 F), making it suitable for various applications in pharmaceutical and laboratory settings.
3. Easy-to-Use Interface: The controller features a user-friendly interface with a backlit LCD display, making it easy to read and navigate. It also comes with a large capacity memory that stores up to 200 sets of user-configured temperature profiles.
4. High Accuracy: The controller offers high accuracy with a typical accuracy of 0.1 C ( 0.2 F) and a typical repeatability of 0.05 C ( 0.09 F), ensuring precise temperature control.
5. Alarm and Alert Function: The controller includes an alarm and alert function that alerts users when the temperature goes out of the set range, allowing them to take corrective action promptly.
6. Versatile: The controller is versatile and can be used with various types of temperature sensors, including PT100, RTD, and thermocouples.
Cons:1. Price: The Signet Scientific 3-9750-21 USP controller is pricier than some other temperature controllers in the market.
2. Complex Setup: The controller may require some technical expertise to set up and calibrate, which can be time-consuming for those without extensive experience.
3. Limited Connectivity: The controller does not offer extensive connectivity options, such as Wi-Fi or Ethernet, which may limit its use in modern industrial settings.
In conclusion, the Signet Scientific 3-9750-21 USP controller is an excellent choice for those seeking a reliable and accurate temperature controller for USP compliance applications. Its wide temperature range, easy-to-use interface, high accuracy, and alarm function make it a valuable investment for laboratories and pharmaceutical settings. However, its price and complex setup may be a deterrent for some users.
Recommendation:If you are in a pharmaceutical or laboratory setting and require a temperature controller for USP compliance applications, the Signet Scientific 3-9750-21 USP controller is a great investment. Its accuracy, reliability, and ease of use make it a valuable tool for maintaining temperature control and ensuring the quality of your products. However, if you are on a tight budget or require extensive connectivity options, you may want to consider other temperature controllers in the market.
Details:
Manufacturer part number: 3-9750-21. 2-year MRI shield protection plan included. Special instructions. Most items are in stock when they listed.
Signet Scientific 3-9750-21 ph controller ph controller designed for measurement process control applications with 8-button keypad and led display front panel.specifications brand: Signet. A previously used, fully functional product that may have some signs of cosmetic wear. Signet Scientific 3-9750-21 ph controller manufactured by Signet Scientific. The product must be the original item shipped, with matching serial numbers if applicable.
specifications faclighting:
- brand: Signet Scientific
- mpn: 3-9750-21
- part type: Controller
shipping faclighting:
- carrier: ups
- class: standard, one-day
- service: ups ground, ups next day air
- transit: 5-9 days
- type: calculated
offer faclighting:
- prices: $218.70–$290.00
- item condition:
- Used
- New – Open box
- best offers: true
- sold #: 9
- in stock #: 5
- started: april 18, 2026
- options: ship-to-home
- availability: in stock
returns faclighting:
- time: 30 days
- paid by: buyer
- policy: returns accepted
- method: money back
payments faclighting:
- credit card: diners-club
- wallet: google-pay
- other
seller faclighting:
- # reviews: 24245
- rating: 99.8%
- city: mount sterling, kentucky
general faclighting:
- category: Business & Industrial > Maintenance Safety > Facility > Lights Lighting
Grouped With:
- 3-9020-111-011: CONTROLLER, George Fischer Signet
- 38860: CONTROLLER, Signet Scientific






