DPT-22 vs. 100SDP: Which DP Transmitter
Fits Your Application?
Not every differential pressure
application needs the same level of precision or connectivity. NK Instruments
Pvt. Ltd. offers both the DPT-22 and the 100SDP Differential Pressure
Transmitters - two reliable options built for different points on the
accuracy-and-integration spectrum. Here's how to tell which one your process
actually needs.
⚙️ DPT-22 -
Straightforward, Reliable DP Measurement
The DPT-22 is built around a
piezo-resistive sensing element, giving fast, dependable differential pressure
readings for everyday industrial use. It delivers a standard 4–20 mA DC (or
0–10V DC) output proportional to input pressure, with stainless steel,
hermetically welded wetted parts for long service life across clear gases and
liquids.
Best suited for:
•
General-purpose DP monitoring across filters,
strainers, and process lines
•
Applications where a simple analog signal is all your
control system needs
•
Cost-sensitive installations that still demand rugged,
hermetically sealed construction
🔧
100SDP - Smart, High-Accuracy DP Measurement
The 100SDP steps up to a
capacitive sensing element and microcontroller-based design, delivering roughly
four times tighter accuracy than the DPT-22 - rated at ±0.075% of URL versus
±0.25% F.S. Its 4–20 mA output carries a superimposed HART digital signal, so
the same 2-wire loop that powers the transmitter can also carry diagnostics and
remote configuration data back to your control room. Built in SS316 with an
IP67-rated enclosure and static pressure ratings up to 130 bar, it's suited to
demanding, high-integrity installations.
Best suited for:
•
Applications where measurement precision has a direct
impact on product quality or yield
•
Installations that benefit from HART-based remote
diagnostics and configuration, reducing site visits
•
Harsher process conditions - higher static pressure,
outdoor or washdown environments (IP67)
💡 In short:
If your
process just needs a reliable, standard DP signal, the DPT-22 gets the job done
cost-effectively. If your process demands tighter accuracy, higher pressure
ratings, or smart diagnostics over a HART-enabled loop, the 100SDP is the
stronger long-term choice.
📊
Quick Comparison
|
|
DPT-22 |
100SDP |
|
Sensing element |
Piezo-resistive |
Capacitive |
|
Accuracy |
± 0.25% F.S. |
± 0.075% of URL - 4x tighter |
|
Output signal |
4–20 mA DC / 0–10V DC |
4–20 mA DC with HART digital
communication |
|
Remote diagnostics /
configuration |
Not supported (analog only) |
Supported via HART, over the
same 2-wire loop |
|
Wetted parts |
SS316 |
SS316 |
|
Ingress protection |
IP66 |
IP67 |
|
Static pressure rating |
Up to 20 bar |
Up to 130 bar |
|
Best fit |
Straightforward DP monitoring,
cost-sensitive applications |
High-accuracy, HART-integrated,
harsh/critical applications |
🎯
Bottom Line
Both transmitters share the same
core reliability NK Instruments is known for - the difference comes down to how
much precision and connectivity your application demands. Choose the DPT-22 for
dependable, everyday DP measurement. Choose the 100SDP when accuracy, static
pressure rating, and smart HART communication matter to your process.
Not sure which fits your
application? Our team can help you match the right transmitter to your process
conditions.
📄
Documentation
Catalogues available for both
the DPT-22 and 100SDP - reach out and we'll share full specs for your specific
application.
Get in
Touch
•
🌐
www.nkinstruments.com
•
📧
sales@nkinstruments.com
•
📞
022-41311330/1332/1334 | +91 8108125494 / 7718817685 / 9987275354 / 7718817910
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