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Endress+Hauser
Endress+Hauser EngyCal RH33 BTU Meter
Quote on request
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E+H EngyCal RH33: heat/cold energy calculator; EN 1434; 4–20 mA; Modbus/M-Bus. RFQ.
Download datasheet PDF
RFQ cart holds BOM lines only. Submit for engineering quote.
Key parameters
Measuring range
Heat/cold energy of water, glycol/water, thermal oils per EN 1434 / IAPWS-IF97; custody ΔT measuring range approved 0–300 °C
Accuracy
Energy calculation ±(0.5 + ΔΘmin/ΔΘ)% per EN1434/OIML R75; current input 0.1% FS; pulse basic accuracy 0.01% of reading
Output
1× 4–20 mA; 2× digital open collector; optional relays; USB/Ethernet/Modbus RTU/TCP/M-Bus
Supply
100–230 V AC (−15%/+10%) 50/60 Hz or 24 V DC (−50%/+75%) / 24 V AC (±50%); loop power 24 V DC (±16%) for sensors
Protection
Panel: IP65 front / IP20 rear; Field housing: IP66 / NEMA 4X (IP65 with double-seal gland)
Ambient temperature
−20 to +60 °C (−4 to +140 °F)
Fits heat and cold energy calculation where you need an Endress+Hauser EngyCal RH33. Calculator for water, glycol/water and thermal oils per EN 1434 / IAPWS-IF97 with energy accuracy ±(0.5 + ΔΘmin/ΔΘ)%, 4–20 mA and open-collector outputs, plus optional USB/Ethernet/Modbus/M-Bus communications.
Key advantages
- Duty — Heat/cold energy (EN 1434 / IAPWS-IF97)
- Accuracy — ±(0.5 + ΔΘmin/ΔΘ)% energy class
- Outputs — 1× 4–20 mA; 2× open collector
- Comms — USB/Ethernet/Modbus RTU/TCP/M-Bus options
- Housing — Panel IP65 front or field IP66 / NEMA 4X
Typical applications
- District heating BTU.
- Chilled-water energy.
- Thermal-oil energy loops.
Selection guide
- Panel vs field
- Comms option
- ΔT sensors / flow inputs
Common mistakes
- Wrong fluid property set.
- Missing custody ΔT setup.
- Ambient outside −20…+60 °C.
When to RFQ / what to tell us
- Housing/comms/inputs.
- Quantity, ship-to.
Request a Quote · Get selection help
Specs
| Spec | Value |
|---|---|
| SKU | 45968 |
| Brand | Endress+Hauser |
| Model | EngyCal RH33 |
| Product type | BTU Meter |
| Measuring range | Heat/cold energy of water, glycol/water, thermal oils per EN 1434 / IAPWS-IF97; custody ΔT measuring range approved 0–300 °C |
| Accuracy | Energy calculation ±(0.5 + ΔΘmin/ΔΘ)% per EN1434/OIML R75; current input 0.1% FS; pulse basic accuracy 0.01% of reading |
| Output signal | 1× 4–20 mA; 2× digital open collector; optional relays; USB/Ethernet/Modbus RTU/TCP/M-Bus |
| Supply voltage | 100–230 V AC (−15%/+10%) 50/60 Hz or 24 V DC (−50%/+75%) / 24 V AC (±50%); loop power 24 V DC (±16%) for sensors |
| IP rating | Panel: IP65 front / IP20 rear; Field housing: IP66 / NEMA 4X (IP65 with double-seal gland) |
| Ambient temperature | −20 to +60 °C (−4 to +140 °F) |
Documents
FAQ
Q: Standard? A: EN 1434 / IAPWS-IF97 class.
Q: Outputs? A: 4–20 mA + open collectors.
Q: What should I send for a quote? A: Housing/comms/inputs, quantity, ship-to.
Links
| Parameter | Value |
|---|---|
| Measuring range | Heat/cold energy of water, glycol/water, thermal oils per EN 1434 / IAPWS-IF97; custody ΔT measuring range approved 0–300 °C |
| Accuracy | Energy calculation ±(0.5 + ΔΘmin/ΔΘ)% per EN1434/OIML R75; current input 0.1% FS; pulse basic accuracy 0.01% of reading |
| Output | 1× 4–20 mA; 2× digital open collector; optional relays; USB/Ethernet/Modbus RTU/TCP/M-Bus |
| Supply | 100–230 V AC (−15%/+10%) 50/60 Hz or 24 V DC (−50%/+75%) / 24 V AC (±50%); loop power 24 V DC (±16%) for sensors |
| Protection | Panel: IP65 front / IP20 rear; Field housing: IP66 / NEMA 4X (IP65 with double-seal gland) |
| Ambient temperature | −20 to +60 °C (−4 to +140 °F) |
| Display | 160×80 Dot-Matrix LCD white backlight; colour change on alarm; active area 70×34 mm |
| Approvals | CE; UL listed; CSA GP; MID 004 (custody transfer) EN1434; OIML R75; KC |
| Mounting | Panel, wall, pipe, or field housing; 144 × 144 × 103.1 mm |
| Sensor type | BTU/energy calculator with 1× pulse/analog flow input + 2× RTD/analog temperature (pressure) inputs; electronic Callendar-van-Dusen sensor matching |
| Notes | Specs from Endress+Hauser TI00151KEN_0421 + endress.com EngyCal RH33 page. |
| Dimensions | 144 × 144 × 103.1 mm (5.67 × 5.67 × 4.06 in) |