0.1s Low-Delay
Response & Seamless Bluetooth 5.0
BOOKOO Espresso Monitor Pressure Sensor
Sale price$125.10 USDRegular price
$139.00 USD
In stock, ready to ship
Key Highlights:
- Bluetooth 5.0 | 0.1s Low-Delay,Response & Seamless
- One-Tap Pressure Profiles | App Sync: BOOKOO N & Beanconqueror
- Universal Fit | Flair58, Lelit v3, Rocket R58, Profitec Pro series and more
- Durable Design | 304 Stainless Steel, 180-Day Battery, 12 Bar Rating
Why Choose EM Bundle?
Everything you need to upgrade in one kit.
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No Extra Purchases Needed: The EM Bundle includes a premium mechanical gauge and a precision-threaded Tee. Everything required for a seamless setup is in the box.
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Hassle-Free Installation: Designed to keep your espresso machine’s original parts 100% intact. No complex setup needed.
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Effortless Digital Precision: Say goodbye to guesswork. Visualize pressure in real time and level up your espresso from day one.
BOOKOO Espresso Monitor Pressure Sensor
Black / EM
Sale price$125.10 USDRegular price
$139.00 USD
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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BOOKOO Espresso Monitor Pressure Sensor
Upgrade Your Espresso Machine with Intelligent Features.
0.01 Bar
Ultra-Precision Accuracy
180-Day
Ultra-Long Battery Life
20+
Espresso Machine Compatibility
EM & Themis Scale Bundle: Smarter Together
EM captures pressure in real time. Connect it to the app to auto-log time and pressure curves — add a scale (Themis or other compatible models) to unlock weight, flow rate, and puck resistance in the same session.
Click on any instruction to view its corresponding position on the interface
Pressure Monitoring
Monitor real-time brewing pressure data and pressure curves.
Live Flow Rate
Visualize flow alongside pressure to analyze water movement through the coffee bed.
Real-Time Yield
Track liquid weight second by second for consistent target yields.
Puck Resistance
Measure real-time puck resistance to spot possible channeling and evaluate extraction consistency.
1
Pressure Monitoring
Monitor real-time brewing pressure data and pressure curves.
2
Live Flow Rate
Visualize flow alongside pressure to analyze water movement through the coffee bed.
3
Real-Time Yield
Track liquid weight second by second for consistent target yields.
4
Puck Resistance
Measure real-time puck resistance to spot possible channeling and evaluate extraction consistency.
Which Tee Fits You?
Select your espresso machine to see the matching Tee & installation.
G1/8 Thread
✓ The pressure port uses a G1/8 thread — the tee screws in directly, fitting Flair 58 (all variants) & Flair 49Pro & Flair 2Go, with zero disassembly of original parts.
Cafelat Robot Dedicated Port
✓ A custom tee designed specifically for the Cafelat Robot manual lever machine, with a different install method. Fits Cafelat Robot Barista.
E61 Group Head
✓ E61 group heads use an M6 thread port and require an adapter — included in the kit. Fits Lelit V3, Rocket R58, Profitec Pro 400/500/600/700, and ECM Puristika/Mechanika/Synchronika.
M9 Adapter
✓ This port uses an M9 thread and requires an adapter — included in the kit. Fits Flair Pro2 and Flair Pro3.
Fit in Your Machine in Seconds
Leverage our multi-size Tee bundle to adapt, upgrade, and perfect your coffee setup.
Zero Modifications
Replaces your original pressure gauge port without altering internal mechanics. The entire installation is 100% reversible.
Instant Data Visualization
Transform single-function setups into data-driven powerhouses with real-time pressure curve monitoring.
Dual-Gauge Security & Perfect Seal INTUITIVE DIAL INTERFACE
Connected in parallel, your original mechanical gauge remains fully operational with zero compromise on safety.
Universal Fit for 20+ Prosumer Machines
Our tailored, multi-thread-size adapter kits ensure a seamless fit for E61 groupheads and leading brands including Lelit, Rocket, Profitec, ECM, and more.
Zero Modifications
Replaces your original pressure gauge port without altering internal mechanics. The entire installation is 100% reversible.
Instant Data Visualization
Transform single-function setups into data-driven powerhouses with real-time pressure curve monitoring.
Dual-Gauge Security & Perfect Seal INTUITIVE DIAL INTERFACE
Connected in parallel, your original mechanical gauge remains fully operational with zero compromise on safety.
Universal Fit for 20+ Prosumer Machines
Our tailored, multi-thread-size adapter kits ensure a seamless fit for E61 groupheads and leading brands including Lelit, Rocket, Profitec, ECM, and more.
Specifications & Compatibility Guide
Sale price$53.10 USDRegular price
$59.00 USD
Sale price$35.10 USDRegular price
$39.00 USD
Sale price$35.10 USDRegular price
$39.00 USD
Sale price$35.10 USDRegular price
$39.00 USD
Sale price$53.10 USDRegular price
$59.00 USD
Sale price$35.10 USDRegular price
$39.00 USD
Sale price$35.10 USDRegular price
$39.00 USD
Sale price$35.10 USDRegular price
$39.00 USD
Compatible Models
E61 grouphead espresso machines
(e.g., Rocket Appartamento HX, etc.)
Cafelat Robot manual lever espresso makers
Flair Pro 2 & other M9-port models
Flair 58 (all variants) & Flair 49 Pro
& Flair 2Go
Machine-End Thread（Thread OD ）
M6×1.0(E61 OEM Standard)
( 6mm )
M5×1.0(Robot OEM Bleed Port Standard)
( 5mm )
M9(Flair Piston Port Standard)
( 9.72mm )
G1/8 female thread （Universal）
( 9mm )
Sensor / Gauge Port
Dual G1/8 female ports
Dual G1/8 female ports
Dual G1/8 female ports
Dual G1/8 female ports
Tee Weight
~175g
~75g
~38g
~38g
Mechanical Gauge Weight
~55g
~55g
~55g
~55g
Operating Pressure (Recommended)
0–12 bar
0–12 bar
0–12 bar
0–12 bar
Tee Material
304 Stainless Steel
304 Stainless Steel
304 Stainless Steel
304 Stainless Steel
Installation Method
100% Reversible.
Replaces OEM M6 plug;
no machine modification required.
100% Reversible.
Replaces OEM bleed port screw;
no machine modification required.
100% Reversible.
Replaces OEM piston rod;
no machine modification required.
100% Reversible.
Replaces OEM piston rod;
no machine modification required.
BOOKOO Product Integration
BOOKOO EM Pressure Sensor
/Real-Time App Curve Monitoring
BOOKOO EM Pressure Sensor
/Real-Time App Curve Monitoring
BOOKOO EM Pressure Sensor
/Real-Time App Curve Monitoring
BOOKOO EM Pressure Sensor
/Real-Time App Curve Monitoring
What's in the box（TBC）
E61 Tee, Mechanical Gauge,
Installation Tools
Robot Dedicated Tee, Mechanical Gauge,Installation Tools
M9 Tee, Mechanical Gauge
G1/8 Tee, Mechanical Gauge
FAQs
1. Which espresso machines are compatible with the BOOKOO Espresso Monitor Pressure Sensor?
- The BOOKOO EM uses a G1/8 thread and can be installed directly on machines with a G1/8 pressure port, including Flair 58, Flair 58 Plus, and other compatible G1/8 setups.
- An M6 adapter is included for many E61 group machines, such as Lelit V3, Rocket R58, Profitec Pro 400/500/600/700, ECM Puristika, Mechanika, and Synchronika.
- Machines with non-G1/8 or non-M6 ports may require an additional adapter or T-connector. Some models, including La Pavoni Europiccola, Profitec Move, and Rancilio Silvia, are not recommended as direct-fit installations.
- Learn more: Compatible Devices / E61 Group Heads
2. What tools are needed for installation, and how should leaks be checked?
- In most cases, installation may require an adjustable wrench and PTFE tape for proper sealing. The sensor should be tightened gently and not over-torqued.
- After installation, check the connection for leaks before brewing. If leakage occurs, check whether the washer, sealing ring, or PTFE tape is installed correctly.
- Learn more: Installation Guide / Required Tools
3. Which scales and apps work with the BOOKOO EM?
- The BOOKOO EM works with BOOKOO Themis Mini Scale, BOOKOO Themis Ultra Scale, etc. Pressure data can be monitored through the BOOKOO N App or Beanconqueror.
- In the BOOKOO N App, brew history and pressure curves can also be reviewed and exported for extraction analysis.
- Learn more: Compatible Devices / Pairing with BOOKOO N App / Export Pressure Data
4. How long does the battery last, and can the EM be used while charging?
- The BOOKOO EM has a 450mAh lithium battery, with up to 30 hours of continuous use and up to 180 days of theoretical standby time.
- When the battery is low, the LED indicator turns red, and the battery level can also be checked in the BOOKOO N App. Use while charging is not recommended. For safety and better battery life, fully charge the device and disconnect the charging cable before brewing.
- Learn more: Battery Life / Charging Status / Use While Charging
5. Is the BOOKOO EM waterproof, and does it need heat protection?
- The BOOKOO EM is not waterproof. Avoid rinsing, submerging, or exposing the device directly to water or steam.
- If liquid reaches the surface, wipe it immediately with a dry, soft cloth and make sure the device is fully dry before charging.
- The recommended operating temperature is 0-80°C. When installed near a high-temperature group head, an adapter can help reduce heat transfer and keep readings stable.
Learn more: Waterproof Notice / High Heat Notice
6. What should be checked if Bluetooth connection, data syncing, or auto-start/auto-stop is unstable?
- Make sure the BOOKOO N App and EM firmware are updated to the latest version, and check Bluetooth permission, privacy authorization, and location permission on the phone.
- If the device cannot be detected, charge it for at least 1 hour before reconnecting. Auto-start or auto-stop may also be affected by app version, Bluetooth connection, firmware status, or parameter settings. If auto-stop does not trigger, check that Auto Stop Time is set above 0.
- Learn more: Pairing with BOOKOO N App / Firmware Updates / Connection Troubleshooting / Data Sync & Auto-Start
7. Why is the EM pressure reading slightly different from a mechanical pressure gauge?
- A slight difference is normal. Mechanical pressure gauges have their own tolerance, and the BOOKOO EM has a measurement tolerance of about ±0.1 bar. Small differences compared with a mechanical gauge or another brand’s gauge are expected and usually do not affect extraction judgment.
- Learn more: Pressure Reading Difference
8. More questions?
- Visit the BOOKOO Espresso Monitor Help Center for more setup tutorials, compatibility details, and troubleshooting guides.
- For additional assistance, please contact BOOKOO Customer Support.
Espresso (positive)Installation (positive)Scale (positive)Sensor (positive)Price (positive)
B
Everything looks good, it's what I expected, except battery, I made 5 coffee per day and the battery drains fast.. In 2 days drop from 100% to 20%...
A
It's a pretty cool device, I am starting to use it to learn to expand my espresso making knowledge and improve my shots overall with precision
b
It works well, simple to setup and provides valuable insights on the coffee profile you are brewing
O
The sensor is a great addition. With the help of the paddle on my Lelit Bianca, I can now track and assess more accurately what happens during espresso preparation.
With the Lelit Bianca, I can now manually adjust the pressure profile.
Excellent.
B
I have 1 EM installed on my e61 group head and another on my LaPavoni Stradivari. They both work fine. I use BooKoo app on my iPhone and record my espresso pulls. It’s a valuable tool.
d
I'm loving it for my F58 and Beanconqueror
Specially that no longer have to start and stop my timer and being able to check my profiles, even in visualizer
K
The BooKoo Espresso Monitor is great value product which I’m using with a Flair 58, the BooKoo Themis scale and the BooKoo app, to improve my espresso.
G
The combination of the pressure sensor and the scale works amazing.
Getting all this data in real time definitely reduces wastage while dialing in new beans and also is a great help in getting consistent output everyday.
Thanks Bookoo team for making amazing products that work so well together.
I must also say that the build of the scale is phenomenal. It is small yet sturdy and looks great anywhere you keep it.
P
Excellent quality and built to last.
A
Must have for coffee nerd! I’m in love with this gadget! Bookoo nailed !
E
great
A
highly recommended if you want to turn a flair to digital
A
Sensor is working fine.
K
Prima apparaatje. Gebruik het met m'n Cafelat Robot.
A
Good
A
Great product, material and well produced.
Y
Works very well, super easy to get into, immediately connected to the app with no issue.
A
Easy installation. Works great and the information is very useful
I
This little gadget has helped me up my espresso game. I had to resort to a third party app to get the best out of the sensor as it only once connected to the WiFi and the scale.
A
Ultra premium scale
A
Great scale, work great , price was very good & delivery was fast, all in all a fantastic service & product
R
This product is of exceptionally high quality and works perfectly with the app. It’s very easy to use and makes preparing coffee an absolute joy. The investment is definitely worth it – it brings so much variety and creativity when making unique and delicious coffee recipes. Highly recommended for any coffee lover!
A
Easy setup and amazing quality and look of the EM + Mini scale combo.
Highly recommended.
L
Simple installation, confident function, best price
A
Great
A
Quick response for both measurement and bluetooth, compact, light, Great!
A
Works as advertised, delivery was on time as well. No complaints to far!
S
Got both the electronic sensor and the manual pressure gauge combination for my Flair 58. They work seamlessly. Frankly I don't use the Bookoo app because I feel it is clunky (other than for firmware updates), but the EM and the smart scale both connect to other coffee apps. I use Bean Conqueror and the connection is seamless everytime with no hiccups or time wasted getting them to connect with the app and work in sync.I'm so glad that this is part of my setup and it's helped me dial in espresso so much more quickly. Great accuracy and no noticeable latency.