DATA SHEET

Radio measuring capsule heat meter type 4.5.1

Precise measurement even with very small flow rates. Simple. With radio. Without entering the apartment.

The type 4.5.1 is the newest generation of Techem measuring capsule heat meter. It combines calculator,

volume measuring unit and temperature sensor in one. In the radio 4 device version, the consumption

data determined are transmitted by radio.

More IQ per °C

The measuring capsule‘s due date programable calculator

offers a diverse range of display functions, amongst others

energy, due date, energy status at the due date, flow rate,

inlet and outlet temperatures, temperature difference, per-

formance, volume and with cyclical self-test and diagnosis

display for the flow direction and temperature sensor in-

stallation. As much intelligence as you can fit in a measuring

capsule of this size!

Heat meter type 4.5.1 radio 4

The type 4.5.1 radio 4 is radio activated and automatically

transmits reading values after installation in the apartment.

The radio telegram contains current as well as mid month

and month end values to eliminate the need for arranging

appointments, intermediate readings or anyone needing to

enter the apartment. The data is encrypted and secured using

the CRC method.

In a nutshell

multijet meter technology ensures high measuring accuracy and stability

Installation location (inlet/outlet) programmable during installation

Reading flexibility with radio telegrams regarding OMS

(Open Metering Systems) standard

OMS certificated telegram configurable

approved for overhead installation, easy to install measuring capsule method

cable of the inlet temperature sensor with up to 6 m length

optional removable calculator

Secure data transfer by encryption and CRC method

MID approval (Measuring Instruments Directive)

Base for measuring accuracy is a water quality according to the working sheet

AGFW FW 510 and VDI 2035

Techem Energy Services GmbH · Hauptstr. 89 · 65760 Eschborn · www.techem.com

DATA SHEET

Radio measuring capsule heat meter type 4.5.1

8485

3.04

.091

9/IN

T ·

Err

ors

an

d c

han

ges

res

erve

d.

Dimensions compact

Dimensions with removable calculator

Technical data Main meter

Nominal flow qp (m3/h) 0.6 1.5 2.5

Maximum flow qs (l/h) 1,200 3,000 5,000

Minimum flow qi (l/h) 24 30 50

Startup horizontal (l/h) 2 2 2.5

Startup vertical (l/h) 8 8 12

Pressure loss at qp (bar) 0.03 0.20 0.24

Pressure loss at qs (bar) 0.1 0.74 0.92

kvs value (∆p = 1 bar) (l/h) 3270 3270 5050

Temperature of medium OMed (°C) 15 … 90

Protection class IP 65

Nominal pressure PN (bar) 16

Connection thread on meter Measuring capsule M 62 x 2 optional: type Ista (2“), type Allmess (M77 x 1,5), type Minol (M60 x 1,5)

Technical data Calculator and temperature sensor

Meter temperature range O (°C) 0 … 105

Temperature difference ∆O (K) 3 ... 100*

Consumption calculation ∆O (K) from 0,3

Ambient temperature O (°C) 5 … 55

Environmental conditions E1 + M1, class C

Power supply 5 years + reserve

Protection class calculator IP 65

* in symmetrical installation of the temperature sensor pair

Technical data radio

Radio mode unidirectional Standard: Mode C1 according to OMS V4

Radio data transmission Standard: – Annual due date (as OMS data point) – Consumption data from 12 mid-month and end of the month values – Status information

Transmitting frequency (MHz) 868.95

Transmiting power (W) 0.003 ... 0.015

Transmission period (sec.) 0.008 … 0.014

CE-conformity According to guideline 2014/53/EU (RED)

Data security Encryption according to OMS standard; recognised by BSI TR-03109

Future-proof design prepared for EED (Directive 2012/27/EU)

Pressure loss graph for measuring capsule meters

Flow Q (l/h)

Pres

sure

loss

p (m

bar)

qp 0.61,200

600

1000

0 6,0002,000 12,000

qp 1.5 qp 2.5